Malicious PDF — malware analysis report

Static analysis result for SHA-256 27be832ba6c62233…

MALICIOUS

PDF

106.1 KB Created: 2021-03-20 05:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bae700706cc2bb78a1ca3200c41e557f SHA-1: 8b12da7d24690c378ebc89138faaadcf27d18a0e SHA-256: 27be832ba6c62233ef4ae0a2e5755642ba4a6398ec2036f007b1b88f5bcf58d7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 6

  • 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.
  • 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://maypoin.ru/award?keyword=factors+affecting+academic+performance+thesis+pdf PDF link annotation
    • https://cdn.sqhk.co/sabiseleto/ij6ifif/56460133965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_601f7b4972477.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5fca862b7d488.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/70pzUgj/aadhar_card_not_otp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_60443d59b1c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499958/normal_604a60f943ea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_6002625bbb188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_603b9ac777b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_6026a800c5801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_60212bfeb8b42.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/eRMhctn/53763135292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_60150048a9186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5ff690fee5481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://20097937-9b7a-4da4-851c-33e9a8906939.filesusr.com/ugd/1e3518_f22230d71e474947bb81ad39ac82de51.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_46e6bbe728db497c861eb7c0f0b1e065.pdf?index=trueIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_240ce6141cbd47329afdb00faf53b00b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/ambient_rain_sounds.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_4672a808e465440f911f1eb3d3d43ffa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/wutadujesadorememovizi.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_c501f490916346a8b78c405279f8231c.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE5 5492 bytes
SHA-256: 9ea12647d8513a53a5b3d6e53ed4d5531bd641bfdb9c68e8b2705b415007ade8
font_01_sfnt_off00017d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D6A 11188 bytes
SHA-256: 160c09281c6a585bd11e549b2df35334fc2f790e1dc667670662608dad870ff7

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