Malicious PDF — malware analysis report

Static analysis result for SHA-256 7489a81ebdf61ffd…

MALICIOUS

PDF

91.6 KB Created: 2021-03-17 03:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa516643229d06360fca389798b97d66 SHA-1: 13b25c4dd135125a79952453e40b09c0ee4e8ef8 SHA-256: 7489a81ebdf61ffd6884ca1880b3d19ff88c62f204bd84208adaad6395791006
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://zajinet.ru/award?keyword=us+map+with+capitals+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426688/normal_5ff356ee7700d.pdfIn PDF document text
    • https://gaxezoxo.weebly.com/uploads/1/3/0/7/130776828/biwovemelod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445116/normal_6002bd20e6f61.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/6099314.pdfIn PDF document text
    • http://sijojovimem.22web.org/bluestacks_setup_for_windows_10_free.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/kewujumes.pdfIn PDF document text
    • https://luwagibefex.weebly.com/uploads/1/3/5/9/135966535/3277188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_5ff9a4983996a.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/62906112061.pdfIn PDF document text
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/4ca794.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
    • http://jowawaba.atwebpages.com/vafuzuzinok.pdfIn PDF document text
    • http://bavidatesudujig.epizy.com/baby_trend_playard_bassinet_mattress.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/topizemudebuveseloza.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/latest_tamil_movies_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/suwiwivuxalafe.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/2013_fitbit_flex_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/mapuwuvevizufis.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/zedamojexorokobaz.pdfIn PDF document text
    • http://xuwizigev.rf.gd/padisuku.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/dazozaxufexukoputivupa.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_off00011ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 4836 bytes
SHA-256: 1de183f6559b6cbeddd5ebbf0df2710dded06335647bf9bf12b980bd906abcdb
font_01_sfnt_off00012b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B67 11724 bytes
SHA-256: 793e1b406cc9bc2375537536271e43395451ef4e95c347644b4bcb6e36a4263e
font_02_sfnt_off00015335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15335 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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