Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ce1066664428ce…

MALICIOUS

PDF

108.5 KB Created: 2021-05-19 13:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ed9e8c8c51e1c13f28f16738af1a4d25 SHA-1: 2d9d33e86da4932ab613d4aaa7957b44a1c8262d SHA-256: 44ce1066664428cecdff8c68b01789a1648b2cef021bf2f4b3065f4aa82186aa
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, references "Doge miner 2 back to the moon unblocked", suggesting a lure. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=doge+miner+2+back+to+the+moon+unblocked PDF link annotation
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/jubakujujinoxozidodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_6055b63958f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_60253402f2831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_602c214e9b9cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_60083d9fe7b4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_6005377d96b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_60016ad6381d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5fe934ba595b8.pdfIn PDF document text
    • https://junapeborizako.weebly.com/uploads/1/3/4/4/134443413/dazelubusofosi-labudivesas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_60553179726f9.pdfIn PDF document text
    • https://nedalejurozawo.weebly.com/uploads/1/3/0/7/130776692/f42e935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_6055f078548fc.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/6021457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5ffdfe483340d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5ff68fd207ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_6046a2e9e1215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_602b2d75dcbd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10334263-8b8e-4cae-a9ac-1f1a1a70cf0a/lejuzuxojufuviwodudule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a868a46a-a6e3-4755-95c0-cc0d8a967dc5/aint_no_makin_it_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d176ec-0579-4357-8edc-9116bac3a10d/stephen_king_skeleton_crew_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d051b5e-cd30-42d2-8870-07d37f3eb14d/oreck_xl_9100_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dee8d40-a789-4dac-be8a-1cfa2461274e/how_long_does_viking_stove_last.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000167fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FE 5508 bytes
SHA-256: a6ab3168f2d4f09e3785ba5c1dcbb9ce274b8e1dfa2c0c5705a65e4a02bef9b1
font_01_sfnt_off00017a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A92 11900 bytes
SHA-256: e353eb8e4b5e15f55f7c3bc8087accb8cab539cc316ed045cabb775edda8a078

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