Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb374018b23207f2…

MALICIOUS

PDF

68.6 KB Created: 2020-11-09 18:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1be3f45840e06c58d9ddddd776a2b3e6 SHA-1: 74518d01af5c647255032fa3103ae2215d70c725 SHA-256: eb374018b23207f2c3003072841147b63fb12113e28ae26e58b45b93b73b2aac
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'Microsoft word 2020 calendar free printable', aiming to trick users into clicking on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?keyword=microsoft+word+2020+calendar+free+printable
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f9c2a724485c.pdf
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5f9e200c1c4d9.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f96709c4a355.pdf
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5f9c843606167.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdf
    • https://fozijiruzixusap.weebly.com/uploads/1/3/4/3/134317533/levizu.pdf
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f8dbacad3210.pdf
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87e94834a48.pdf
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/4094924.pdf
    • https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/33b0b92e4f2.pdf
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8a26dec4528.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/529623.pdf
    • https://cdn-cms.f-static.net/uploads/4421611/normal_5fa2dcb3391df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6ff1e198-e665-4564-9d7a-1f72aa8b2c53/24644844054.pdf
    • https://uploads.strikinglycdn.com/files/cfdae481-160d-47b4-8735-cce52eb15275/73739609549.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d023.bin
359e24a3a3b1ed2c485183f66983f5cc79d0a516ed4d59c9e91d7341a55cbaa9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 5660 bytes
font_01_sfnt_off0000e38a.bin
1fc38032e97b5ab0009b0f50d950e58df37d2ccdd883ac4d2e2280efd69bd82b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 9816 bytes