Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23791bc701713e3…

MALICIOUS

PDF

87.9 KB Created: 2020-11-13 07:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dfd09b3cf72db79e7dd396dfd0be255a SHA-1: d898e01296955faa63bea47aea6556d471b91488 SHA-256: d23791bc701713e368a3142239a77751c3c3d57783a022a834709cc78a4ed691
156 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=man+myth+messiah+book+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f8b07acd627f.pdfIn PDF document text
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/satiludakijet.pdfIn PDF document text
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/jopef_nuwotavawigus_kerawigi.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/a53a9ef8740.pdfIn PDF document text
    • https://fepirajoruvizu.weebly.com/uploads/1/3/4/3/134311883/jurajupuxe_witopidobukafu_niziwamufo_masojimuk.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/c199ddf3-9164-4def-bdec-ced8049eece4/super_skamper_dog_ramp.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/72801810158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3214a1-2770-4f5f-b78e-b06af0e5c9cb/tcl_55s423_review.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/tenibuwadig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5361beb-4a4a-4436-bd38-b756ed5d7530/xenazikozotuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/circuits_and_symbols_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f741f4-49ed-43aa-8e45-c65704d164cd/harry_potter_and_the_prisoner_of_azkaban_book_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/80327102408.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 5472 bytes
SHA-256: 3f6c97a3684d2f1854e93550a6bf23f18076eba1211c22d4164e44e09b8b1015
font_01_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 10736 bytes
SHA-256: 283f9f13e7401f5c0b5c41acc0ee61126be7deeeb00757937bc939605dfd8048
font_02_sfnt_off0001442f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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