Malicious PDF — malware analysis report

Static analysis result for SHA-256 a706c68588ac8e5e…

MALICIOUS

PDF

70.2 KB Created: 2020-12-19 10:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2f9ff0efd7bd5a0416a778e0032437fa SHA-1: d966e72b845239c9f2495612d6de27e6e022b0d1 SHA-256: a706c68588ac8e5e1a0b1a7ca1368df035336548bc5ab0121c20d1f26c779c1f
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/aws?utm_term=alkanes+lecture+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448724/normal_5fd7ae91b35b6.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/71c353.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/gajolala.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/widofafane/rajowezugelepotagojuvav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb6d502-64b8-4eee-b512-6d795d2ac619/the_age_of_deception.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb4ef27-33cc-4772-9339-94f85e442775/kaxoluzofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1ec49d-b6ff-42a5-86a9-51314c012d41/most_meaningful_experience_amcas_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac09b49-14f8-4185-aef9-df75d008c2b1/law_of_property_act_1925_section_196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354e3585-b269-45cf-9bf9-7d7cc895a480/pokemon_platinum_cheats_for_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/utorrent_free_for_mac_10._7._5.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/28841159339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489bc04a-1d44-4d8a-b097-886d752526f7/62336514689.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 3

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_off0000c941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC941 5036 bytes
SHA-256: d90abf964d1c03122af454a19238d7cc1520ab49a06200883aa85b60b383c86f
font_01_sfnt_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 10600 bytes
SHA-256: 630e960e5813c62869923556ed329bd8a8a880efb3f43aae75d4b8d683813c02
font_02_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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