Malicious PDF — malware analysis report

Static analysis result for SHA-256 55280043950403b9…

MALICIOUS

PDF

205.9 KB Created: 2021-08-12 13:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: d1a5a50fa3c6c14294b866b823ebc061 SHA-1: 667111b44955cbd14bc292ecb931aa84c1830370 SHA-256: 55280043950403b90138f9c62203e9aec523674fc5677d0685fac37d5185733c
266 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7744

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bhhangkhong.com/upload/images/files/varirame.pdf In PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f2cf95b61---87907789294.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/vh9qkpcarve51ams65qirv5j0h/98199213702.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/f18e5697c32b735124e3ded4041a9aac/pilojumujekewazetegijo.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/93064058607.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d192f613556---18836105938.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/fuwewufujuxolonetamab.pdfIn PDF document text
    • http://chpcentre.com/files/file/ginomegixidepogor.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/14129089536.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/vobomusi.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210610024844.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/52306382765.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff988b662a---lezakejexenitudur.pdfPDF link annotation
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ej1m79jrmjfacil2mqnd8m9a4n/woradesifeg.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/vabilugolelekigiravu.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/54235199207.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087b07457fcd---62657262631.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/gekov.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/64885375187.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/gitakobajozinagekuvan.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f3cf314443212ca21d3c6eeca9655ea5/jojebibomumofumarim.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/mexuwe.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210519011731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+far+apart+should+deck+railing+posts+bePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0001dddb.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0001dddb.bin)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5F2 11308 bytes
SHA-256: 573ee7ea039892138401d694884feb5cbe2cfc7a33fc6266d0e95a72f1a9014d
font_02_sfnt_off00021005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21005 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_03_sfnt_off0002256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2256E 78588 bytes
SHA-256: f4fae3af2a8fe905894c5f3a5262ad3b62fa87f56317b997b4bf299828232292
font_04_sfnt_off0002f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6DB 19064 bytes
SHA-256: 1e4d34b9f2125b2b9d856a7bf9138322e52afd9c8ea2714f9d21683ffa8e84d2