Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bb47d6a149d210…

MALICIOUS

PDF

65.1 KB Created: 2021-06-06 17:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5f80338ecb3e7e82145f3e6960e9aae7 SHA-1: d85b623aeef5e48fae25ab76b2866f1e1936cc6d SHA-256: 87bb47d6a149d21004901246e2b908376d52278fc9cba27a3a0d3f5ca2d1640a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to attract traffic. The primary URL points to a site offering a "rapidex spoken english tamil book free download pdf", indicating a phishing or scam lure. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

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
  • 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
  • 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://philabc.ru/pbw?utm_term=rapidex+spoken+english+tamil+book+free+download+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370278/normal_604ec7fbedc0f.pdfIn PDF document text
    • https://laripevomed.weebly.com/uploads/1/3/4/2/134266376/sitajod_rakajadisi_sonijoguteme_kisulexipiwib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_604b61b272515.pdfIn PDF document text
    • https://dovavifedudefew.weebly.com/uploads/1/3/2/7/132710721/xavimilalepub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_6064f4ee9bb9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_602d9536141a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5fea4484d7bc4.pdfIn PDF document text
    • https://dulewexafup.weebly.com/uploads/1/3/4/7/134702005/rusupuxazozire.pdfIn PDF document text
    • https://rebusisi.weebly.com/uploads/1/3/4/0/134017700/7930289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5ffcefcb1478a.pdfIn PDF document text
    • https://vowufesoval.weebly.com/uploads/1/3/4/8/134885018/ce3ed01eab308c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_5fd147bfbd3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_605af18581f16.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/9814783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_6052fedfbb5f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_604a56535a359.pdfIn PDF document text
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/2207648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_60bb020496d66.pdfIn PDF document text
    • https://fewarixavaj.weebly.com/uploads/1/3/4/8/134847043/6269067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokojifidesi.pbworks.com/w/file/fetch/144514545/89961779865.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144680382/shaadi_me_zaroor_aana_full_movie_download_moviescounter.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/144535065/suicide_squad_full_movie_download_in_hindi_ipagal.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/40031736624.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144717558/keune_hair_color_good_or_bad.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5828 bytes
SHA-256: 510a74c80a14715a41d0954f08f68d8fac9fab3820177b3655f4b86454886005

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