Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2acca8f17290f55…

MALICIOUS

PDF

73.3 KB Created: 2021-02-18 21:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c4c41f3237d772479cd569dbedc6cab5 SHA-1: 1a2d000e9e5c644cb54fe6c1fffcd364c9b657bf SHA-256: e2acca8f17290f55dc63db53f03ece0a23ca439687f893bfc60e3c3dd8d47552
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one specifically pointing to 'bologen.ru/aws?utm_term=pfaff+sewing+machine+repair+parts', suggesting a lure to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=pfaff+sewing+machine+repair+parts PDF link annotation
    • http://j3vnci4.xyz/angular_deformity_growth_platep6b0d.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/nuroranu_kanegetexu_jedaxej_wokafut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fde057e5dcfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_602c58ccd90b0.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/8932910.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/48512fc5a.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/zetekizinasu.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/2895800.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/7964675.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://s3.amazonaws.com/mubefula/keel_kavacham_argala.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/40812649649.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/different_types_of_houses_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/bad_blood_series.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/22327114908.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/72104956048.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/android_recyclerview_layoutmanager_github.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/christian_baby_girl_names.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_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 5168 bytes
SHA-256: bc8465dd6510b0c69d33bfe429927b804114b3b785ac2e3cf454aed05632b200
font_01_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 10596 bytes
SHA-256: 28d88bcd1c5f9489f0ed69e2933f52bccf4189845448a1fe73fd75e0bac0cea5
font_02_sfnt_off00010a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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