Malicious PDF — malware analysis report

Static analysis result for SHA-256 071ea275d102b92c…

MALICIOUS

PDF

70.5 KB Created: 2021-02-21 13:34:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 77801cfe46d4c1652a8969c8986517bb SHA-1: 2db6b79a882e80634852d425ef661853607a4d87 SHA-256: 071ea275d102b92c5e9a8fff131c4f9ebce7a01a62f928357cd39c185aacbc54
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=which+is+the+best+book+for+learning+c+programming PDF link annotation
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/tozubim_dojoxo_pidukorej_fipaso.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dQi2haQ/wevuxesebupiriwipituxasid.pdfIn PDF document text
    • https://cdn.sqhk.co/mimufedu/deQFgTX/best_free_brain_training_apps.pdfIn PDF document text
    • https://wopatozobaw.weebly.com/uploads/1/3/2/6/132682171/dekujapekozikudumuli.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/baropofog_rowaxok_nexowives.pdfIn PDF document text
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/7723761.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/gutizane.pdfIn PDF document text
    • https://finutobinito.weebly.com/uploads/1/3/1/4/131406284/vonexorupiworixelo.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/jghjijd/dibolesusepojo.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/4ifJFr4/12889867627.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/8038162.pdfIn PDF document text
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/6901161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zubata/winogufekifowikeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/affinity_designer_32_bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/angularjs_formdata_multiple_files.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/gejifu.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/hyperbola_standard_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/direct_indirect_speech_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/98370303292.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/jowuvaw.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_off0000d5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E7 5648 bytes
SHA-256: 5b74b8741b39d06656083ddc40e7e06b6b181af3360c352686aa7a8b124f2337
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 10408 bytes
SHA-256: b77f30aa9ca79132fb54e881492f6c9959f222e3deb25a818d0804d66bd8350b

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