Malicious PDF — malware analysis report

Static analysis result for SHA-256 c592a2595fa042fb…

MALICIOUS

PDF

133.7 KB Created: 2021-01-15 06:33:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cf4a27e0d6b57d3fdd497ecf63e9ae06 SHA-1: 45712030d57ec2342a63f7ee30d74805ac8cff75 SHA-256: c592a2595fa042fb9dd8bef5a04d73349892b86fffd21c9814e3ded61ccfd04a
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ML classifier and ClamAV detection. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions, potentially for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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
  • 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://traffine.ru/aws?utm_term=sepsis+guideline+pediatrics PDF link annotation
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/8184414.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/3339084.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/Aij2Jid/mobily_social_application_package.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/00571f19205a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5f9ef4a02a2bb.pdfIn PDF document text
    • https://juvikenozenukun.weebly.com/uploads/1/3/4/3/134322787/dipubela.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/fomirera.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/rigubu_todatatidaz_pitapukar.pdfIn PDF document text
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/274845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fbc8e941f647.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/xoxaneral/27447161245.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/eulogy_templates_for_brother.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/pawilutumotoxevuvegazalaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A206 6860 bytes
SHA-256: 2916c6bdb055d0e1f53fcbfe43001a7edc7e332fd017cc4205fb6a4b3a17a6be
font_01_sfnt_off0001b8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D9 5344 bytes
SHA-256: f9c946410a47c53aa98e4d29ec2b47a5414342985c8f5bb95dcab230fcc023ea
font_02_sfnt_off0001cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB11 12044 bytes
SHA-256: fe89607b2615e204f62881f75941bfe4a89fba797f9c1e1dddddccda4deed7ae
font_03_sfnt_off0001f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3F6 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6

Open this report in the interactive analyzer, or submit your own file for analysis.