Malicious PDF — malware analysis report

Static analysis result for SHA-256 544224ae79a01c3a…

MALICIOUS

PDF

73.2 KB Created: 2020-11-25 21:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9885995f27c1d4c6b8c2eabdcc5f3636 SHA-1: 9c5854deeef691214326b2997cff45b4c6c51f1f SHA-256: 544224ae79a01c3a1c7143adcbc509dd08df50c27f1d0c8a01f47e97f988e195
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a credential phishing campaign, impersonating Microsoft to lure victims. It contains numerous external links, including one pointing to a Weebly subdomain, which likely hosts the final phishing payload. The presence of multiple external PDF links suggests a link farm or SEO manipulation tactic to increase visibility. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/mafeg.pdf.
  • 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://traffnew.ru/aws?utm_term=bullying+social+story+pdf PDF link annotation
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/mafeg.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/bd1aab53592.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/bubabus.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/gopomore_mowomuxalun_nevuti_toxowidomorug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/xukelaboximadapelewogup.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/fowejut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d455f66-afa0-4112-b6fe-34ff51e071b5/47300506275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009300c7-8768-4210-b0ff-b44014346764/75980326203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09645da5-f4ef-4a20-b6f2-13c54a5c973c/14287746679.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/neluromu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/xusok.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/vivimos_en_una_sociedad.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/punjabi_bass_boosted_songs_320kbps.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 5476 bytes
SHA-256: c92e56ffda6ca29fffd8d78b6df6452240b32f85d48191f87d3476c24b2c7389
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 11232 bytes
SHA-256: feb4601466823f495ee7d39fae24ce3ffc07ea8078aff23e6940465d2992e4cd

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