Malicious PDF — malware analysis report

Static analysis result for SHA-256 2788a22f21b84cea…

MALICIOUS

PDF

89.0 KB Created: 2020-11-24 14:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3590169edc4a1cd9988a0fd8b27dd300 SHA-1: c71b227513c4dd7d1bb01bb5fd55fda8045e7de3 SHA-256: 2788a22f21b84ceafbaa51d74ddecfb11fdf72861396a785a2ebf34563678aca
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. One prominent URL, 'https://traffnew.ru/123?utm_term=dunkin+donuts+iced+caramel+mocha+coffee+calories', is likely used to redirect users to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=dunkin+donuts+iced+caramel+mocha+coffee+calories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5f900850a7caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5f902ce5aebcd.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/7269114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fb2d20b8b74f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5f9c7c4b8a396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_5fb780b6917f2.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/tiliradikeba_zevixovi_kotaxawipezemej_boxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fb82f3f24cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5f9b194ec9144.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e44c2746-49c8-42f6-ae00-ae7c55d125d1/xezukepejiziselutojumoxut.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/golog.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/80465539036.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/gmat_schedule_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/golf_clash_hack_2019_no_human_verification_or_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/46342183369.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/29532804004.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD7 5204 bytes
SHA-256: 39863f5b458c758fe5343328946a6f05cb6bfb195084db2f665e10b40ea645bc
font_01_sfnt_off0001215c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 11560 bytes
SHA-256: c6b79c77926d8bb2a89be66092dbb14ed68bc1b79d40ea8452e9aab4fb2a9d0e
font_02_sfnt_off00014846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14846 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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