Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1133e265310cc99…

MALICIOUS

PDF

84.3 KB Created: 2021-09-07 22:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 72e2325d48c5fb06725b2a2f8ca2886b SHA-1: b235c1a3662dc1508dd8a58f99d8e6a8ae289cf8 SHA-256: e1133e265310cc990c7ca43da6219eeb1381f1b2207b638b3973c7458e49f757
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=english+antonyms+pdf+free+download PDF link annotation
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/nekixabudup.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608739d4929c9---4609240296.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6338b71mn6oh76tgn7d8idgo7d/tizerebezuxefuxuxizedoja.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/kujazemux.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/gapasalasodojeredowed.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/34ad6d5992ee22dcf7924f6a802f8da1/gexoxixumemozip.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/48184436943.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c174c51464---jixakidivo.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/21899981357.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/43468443894.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/bb7b6309db1e3862ae599c2cfe8789a7/69605415090.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/roxonafa.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/98460664911.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb686126977---12923872852.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb85097c2---vugip.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/84vm1f2pagduju2317h5rsq13f/batewijitovusalodejakifup.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210720075214.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f4e20672e6bd409c46fe66b3edb63672/vifajiderasanefik.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/54766100297.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/dirowimolulefe.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/72259071565.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a21bb22afb---livokezozilonoziwevagem.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/40382878558.pdfIn PDF document text
    • 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_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11128 bytes
SHA-256: d3a847a7774fe45dad09f6628e315ce8b894e1779593aa0b521bdcffcc43bdc6
font_02_sfnt_off0001176b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 17224 bytes
SHA-256: 3ab7542fa2f234a3f6ad9cd08a96ec7efbfad3dcdf39a2aa79933207e5571750

Open this report in the interactive analyzer, or submit your own file for analysis.