Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b633c47982e6bd…

MALICIOUS

PDF

72.7 KB Created: 2020-12-17 20:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b0461244aa824470298eb2446f41d2f SHA-1: 9f346798e2a75593c9ba264bf1114a3b00f84425 SHA-256: 62b633c47982e6bdd9662eea6e9d55d81a821f0cfe521104c414f43196c3e1ca
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The embedded links, such as 'https://traffmen.ru/123?utm_term=weather+and+climate+crossword+puzzle+2+answers', are likely used to direct users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=weather+and+climate+crossword+puzzle+2+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8a8a5564d12.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/53b58129d8da34c.pdfIn PDF document text
    • https://rafogemi.weebly.com/uploads/1/3/4/7/134754229/pemef_xewiwewesukar_sesufivijov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcf8036a48c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489441/normal_5fc8b59e7613e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5fb32058a4282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5fb968030fa86.pdfIn PDF document text
    • https://fexazajix.weebly.com/uploads/1/3/4/6/134669695/a0a78e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_5fdb792b9553c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_5fbeb5c9bda16.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/1b5f26e8-e393-49d3-9c96-0a598ed538fe/insinkerator_evolution_pro_compact_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14745f05-e32e-4667-b80e-b1579a6f665d/constraints_or_restraints.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC497 3144 bytes
SHA-256: c0053fcca661adbaf3f260f9aaa4ab5caf5dde31a7eee5cd980aa7e47f0e76d1
font_01_sfnt_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 5480 bytes
SHA-256: 5c2cb944c96095163bc7b6db522bccd8406d6702165122fde88babeb97796a24
font_02_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 10880 bytes
SHA-256: b836362cab779846043f45c70355ad162777f1f5af952159a03dc05152c0b66f
font_03_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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