Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe01cfd49437a7f1…

MALICIOUS

PDF

79.8 KB Created: 2021-09-21 04:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2356577b876f188af4c48ef1592be901 SHA-1: 1a3be772e2d05b8e003612307b49761ecafe5457 SHA-256: fe01cfd49437a7f116a5ecec55e94c9cda397626f2efa072cd5ca90730768618
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest an attempt to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 https://perfecthospitals.org/ckfinder/userfiles/files/rinidujugitija.pdf In PDF document text
    • http://i-physiology.ru/upload/52290225883.pdfIn PDF document text
    • http://puisan.ru/uploads/file/busafubaworokolisapaf.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/65924813999.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/97816461061.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/85186981583.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/jewejasokejadevowejijavi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/120205c88645f46fb63fe2da16dc7c97/73384447132.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/tavosamoked.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/ragomebesonozowezid.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/079cln9apoio2o65j3kna28df2/sipigojedolebezetur.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/17460264093.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/sabomavopokepisefufu.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/lupunodojimedorexofak.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/97080075259.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/repusalevim.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/riripupevojanuluribodot.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614886a624c9d---98137320818.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/ropagitagekuwisifanelejam.pdfIn PDF document text
    • https://korankertas.com/contents/files/20822599289.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/16096786632.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/warefi.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16143ee2870c71---jifasinakixepajig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=codashop+hack+apk+2021PDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 10456 bytes
SHA-256: 088c9520659d48dde76e0487521ee31aae70428579a8a70abf5b3064f756a67b
font_02_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 17800 bytes
SHA-256: 4579b0c994968d5405096dcec8b3b06c7bf78fc30382c6ed527f4f79bf71c01b

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