Malicious PDF — malware analysis report

Static analysis result for SHA-256 7632f0e865bea0c9…

MALICIOUS

PDF

80.4 KB Created: 2021-05-14 05:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 530579d613f58dd17bea3b2731ab8ac6 SHA-1: f08583335ba86eeb4371ebcf09c98f311e4dbb26 SHA-256: 7632f0e865bea0c967d5b5146f6f3b0c5743fb988449e53ea2cc172c0d5c575a
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 0.9993

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://zajinet.ru/strik?utm_term=what+year+is+my+kenmore+refrigerator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472188/normal_6008ebc5362cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416927/normal_5fc91d847993f.pdfIn PDF document text
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/2950279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_605f777a870d4.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/jheU6om/golfer_ernie_nicknamed_the_big_easy_crossword.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5ffc6b595c513.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_6001c76d9d660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_5fc89d64b13f1.pdfIn PDF document text
    • http://lefenup.22web.org/84320772726.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/8321149.pdfIn PDF document text
    • https://nalelijuw.weebly.com/uploads/1/3/4/5/134512153/lirom.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/fibKQYy/dumedoneb.pdfIn PDF document text
    • https://zinobelusetepi.weebly.com/uploads/1/3/5/3/135318062/nizujevivisumozixup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465394/normal_6008c75b70cbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386621/normal_5fdd94fa34b8d.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/mBcuigi/26168469022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6046792a9cdb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5ff58dd5264a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipaliwabalutu.rf.gd/potential_transformer_testing_and_commissioning.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/guideline_pneumonia.pdfIn PDF document text
    • http://tixokozatupevoz.rf.gd/58705873485.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/40543133413.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/craftsman_lawn_mower_repair_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/nidazelorivarotafo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 5328 bytes
SHA-256: 076989b0d42b2171fba12438ca53e2b730fdc3f6faa059823d7cd95299c7a115
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 11796 bytes
SHA-256: 5225b92b639f719589de4d6ee293211629b40c475f0cfeb0fe0d3cac8be3a8ef

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