Malicious PDF — malware analysis report

Static analysis result for SHA-256 2788a60086e59c16…

MALICIOUS

PDF

80.0 KB Created: 2020-12-10 11:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc1f5147a1e9fc92d1a82f319d28b2b1 SHA-1: da073dd064059eaa0628cf12c472edbadeba3fbe SHA-256: 2788a60086e59c166b0eb68531546670d91bed07907284ad2147b66f5cd979b8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://trafficel.ru/123?utm_term=wcw+world+war+3+1997 PDF link annotation
    • https://bibunifa.weebly.com/uploads/1/3/4/0/134040356/tezexisinozisi.pdfIn PDF document text
    • https://jedefefebakex.weebly.com/uploads/1/3/4/8/134870379/gejofumelesib.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/8276399.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/4779283.pdfIn PDF document text
    • https://kepudeveru.weebly.com/uploads/1/3/4/6/134698703/lowezu.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/d49e562bd603b85.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/49e6ed.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/sefiwegegagu/taluxokinarurinikuvijugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015e8f29-acab-4691-94af-de42246f5f5f/lajiloma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab64f03-3c78-411d-9c66-393bc6ba9682/bible_word_study_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd4c684-c772-4e6f-b497-827821014916/.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/vehicle_bill_of_sale_arizona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf37a85-1b81-46a6-96dd-d82811e01531/guraga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43740f87-2455-41e8-8be0-b75d390c8c6a/saanich_parks_and_recreation_active_living_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89597ae3-3c77-426c-9e7c-6ebaa3a9fda9/17532106137.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000116d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x116D4 18168 bytes
SHA-256: 0ff84cfce86c4661bc85d9e60db928165206f169c1a8f034f1f020be63e1c8bc
font_00_sfnt_off0000de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 5312 bytes
SHA-256: 3f28c2dc5eec01025c88ede1a1b1fc5815188dd9e09d08858b3ca76647bdabde
font_01_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 11108 bytes
SHA-256: aa3c06017751ecee14dbe8259ddbf17a3e2fbd9fe11742037ee621659aefba44

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