Malicious PDF — malware analysis report

Static analysis result for SHA-256 60658e964f4e861a…

MALICIOUS

PDF

97.0 KB Created: 2021-04-05 23:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 530736280074a1f93b0ae87a820890ec SHA-1: d5f0a0f23d37a58b27036f255b19b7789c7ac9f2 SHA-256: 60658e964f4e861a2f9f9569935e482ce2f8e88245725b90701aa1337b2b16e7
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=casey+township+library+casey+illinois PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383795/normal_5ffae0e726f89.pdfIn PDF document text
    • https://wivaralizufijol.weebly.com/uploads/1/3/1/4/131483386/vojov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485015/normal_5fe4cd3008d97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_60318c3159665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_5fdc1ab93310f.pdfIn PDF document text
    • http://tonopexoni.22web.org/revista_boticario_ciclo_2_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_5fd70ccecdb44.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/rovojutoruxugojoji.pdfIn PDF document text
    • https://korareledanos.weebly.com/uploads/1/3/4/3/134385748/vutonepewi-katezokirazumog.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/a75fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_60264ddfc75f5.pdfIn PDF document text
    • https://rajajedoweji.weebly.com/uploads/1/3/4/3/134310645/lifepaz-lelabuvivuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492257/normal_5fe8e31041cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a92fc68bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodapoxasime.epizy.com/15276004848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d071b417-86da-4b00-a190-028c5f20de62/51793701110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1168ec8-f0cf-4754-b52c-f1ba00520cab/how_to_clean_ink_absorber_brother.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_a29f9e6f3b6b47c492f839e09acddc18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67745767-bf73-4212-8ea7-1e5eecd5efe7/kogewifavasemidem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab0075b-0112-4bf1-9d9c-323285760913/2000_jeep_grand_cherokee_brake_light_bulb_size.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_28f3060c8ac94a1faf07f5d1a7fe42ef.pdf?index=trueIn 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_off00013b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 5260 bytes
SHA-256: dd93155b50a4ee6c8e0366ef65bf6968090a0e6e91d66a1d6e4831bf09c551ca
font_01_sfnt_off00014d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6A 12280 bytes
SHA-256: 5da40fb8a84e900b66e2a6da4ae104786053e7452f416cb94c9ff0becf698d9f

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