Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce042c85aaf3a96…

MALICIOUS

PDF

76.8 KB Created: 2020-12-26 23:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974ae24c603cdf4dabbb0ef3c8d55d55 SHA-1: 458c04898e6a6e30a3d4a7ef50aa492cfc8993fd SHA-256: 5ce042c85aaf3a96d920b64a73cc4231112edf27c6850f27fe39efb01b91b45a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be an advertisement for a product, likely a lure to encourage clicking the malicious link. No scripts were extracted, but the presence of a malicious URL and the ML classifier's high confidence score suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=defender+hd5+for+sale
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fe613d10f65d.pdf
    • https://lalonofinesuver.weebly.com/uploads/1/3/4/4/134442061/gipigapuguteb_sodukigi_jitinud_fisakil.pdf
    • https://static.s123-cdn-static.com/uploads/4480579/normal_5fe1898c4bfa4.pdf
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fce6fda4fe8a.pdf
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f925e8b8720f.pdf
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/3c629.pdf
    • https://sinuxogutit.weebly.com/uploads/1/3/4/5/134505158/wodozobowuveku_resuwi_vuziwomonezibez_raxuziz.pdf
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fe13582a8e10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f941c2ae-f6b0-480e-a643-96d91cff4594/comment_faire_pourcentage_sur_clavier.pdf
    • https://s3.amazonaws.com/zusevamasor/sars_guide_ring_fencing_assessed_losses.pdf
    • https://uploads.strikinglycdn.com/files/5c10e6e6-6b13-4292-8d25-c93e998a2b98/lunijike.pdf
    • https://s3.amazonaws.com/pajukovuxetu/kemuzijigogesivu.pdf
    • https://uploads.strikinglycdn.com/files/70a503bd-42d1-4201-bd0b-376c5c780b58/xanonufevamomuvon.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_off0000e33e.bin
e9b5a5489bb1a5be6ba5a685c47c8493b156a30288a96be36b63ad4eb1e06f68
pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 5120 bytes
font_01_sfnt_off0000f4b1.bin
7bff6d5756908fc253182099c4874daeeaedc3169efa6079d1859c88b112e305
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 14516 bytes