Malicious PDF — malware analysis report

Static analysis result for SHA-256 da43fed7efda0f9c…

MALICIOUS

PDF

80.6 KB Created: 2021-05-21 05:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9d197eea026ada7cc8d84c4c00dd26a9 SHA-1: bc4bae9d24fa39c229ee61f99aec7dae7eb175f9 SHA-256: da43fed7efda0f9c8bfe047b814b2fe921e80cd83c93db8ad2daf5df1623412f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and part of a link farm. One of the primary links directs to a known malicious domain, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://dafemum.ru/strik?utm_term=noco+genius+boost+gb70+how+to+charge In PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/xedabox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_603a4a75893eb.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/sararisodadifififaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_60260c27cf338.pdfIn PDF document text
    • https://loligilifalo.weebly.com/uploads/1/3/0/7/130775627/tipozipipijunafudeba.pdfIn PDF document text
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/lemasodawobimozusow.pdfIn PDF document text
    • https://bikafosujikus.weebly.com/uploads/1/3/2/8/132815014/b9984ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_5fdc18ca4e3e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd199bbaa231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_601667895402d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcebeb576482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_60530bd0785ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_6066776947dc5.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/9833264.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/fab6dc86-cb15-43ae-992a-492c62b8d8c7/wosupewijof.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/gobasigudesunedumov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac565e2-aeed-486f-b3ab-1ad1151eb55c/how_much_does_it_cost_to_replace_a_clutch_in_a_ford_ranger.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/dozupi.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/platform_number_of_train_55615.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/39794378659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd71255-31e8-4a1f-908b-2828835baba6/jim_wendler_531_assistance_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/green_lantern_emerald_knights_fzmovies.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_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 5452 bytes
SHA-256: 761e4cdba70e43a33c1c66a3a5d6d0db266b2f6ef9950e3bdd90061a56c72fa1
font_01_sfnt_off000110fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FB 10620 bytes
SHA-256: a0a423f08b130b1c08d2e3684f1db6244b142131ab99e2660c007662b9c196a4

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