Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f004bd816f3b6b5…

MALICIOUS

PDF

68.6 KB Created: 2021-01-21 02:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bfb098096d2cbf5090c6d612f64b1cf0 SHA-1: 4e4641b2bd9612de4d0a2e1a23e65e62500c96c0 SHA-256: 3f004bd816f3b6b5c10dbef8fe0c6abb30687058fead4d411ba97ca0934eb867
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user 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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?utm_term=stained+glass+lamp+shades+patterns In PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/6480265.pdfIn PDF document text
    • https://site-1206652.mozfiles.com/files/1206652/76680393498.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/dakofele.pdfIn PDF document text
    • http://sapazukuwujoji.22web.org/european_building_construction_illustrated.pdfIn PDF document text
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/3488355.pdfIn PDF document text
    • http://zobebukore.22web.org/fact_value_policy_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewudupite.epizy.com/safuxoduvesitubufizatuno.pdfIn PDF document text
    • http://jibogifimot.epizy.com/86119381722.pdfIn PDF document text
    • http://wowadowir.epizy.com/equitone_installation_guide.pdfIn PDF document text
    • http://wamodaf.epizy.com/sobeta.pdfIn PDF document text
    • http://dutagewenurodub.epizy.com/xupabanovelijijikewepesos.pdfIn PDF document text
    • http://zigixukotezu.epizy.com/billboard_grammy_2019_performances.pdfIn PDF document text
    • http://ritanuwo.epizy.com/set_background_color_android_code.pdfIn PDF document text
    • http://nodezolejew.epizy.com/dawaxojofinesil.pdfIn PDF document text
    • http://rajunuximu.epizy.com/63778162634.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/99564019318.pdfIn PDF document text
    • http://pejonoma.epizy.com/sutidifevesufifofobomi.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_off0000ce5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5C 5476 bytes
SHA-256: 311734305ef66168377b98e372796a9add002cdc28c5124595e8a89f2bb40de2
font_01_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 10768 bytes
SHA-256: d5c8e7836bff2276c88ed9b7cc0a5c41342769252fe4dbd7124f25fa122a2b41

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