Malicious PDF — malware analysis report

Static analysis result for SHA-256 063f05c626403159…

MALICIOUS

PDF

66.8 KB Created: 2021-03-09 16:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 93b1302396a7cc625b7e164d57207ff1 SHA-1: 0c4fe7d8dcb0f34066f7fcb921a253e777fb57e8 SHA-256: 063f05c626403159e50e530c2f8dc0ca1fe4e135a036c2b0cc370847b2a76f7e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. While no scripts were extracted, the presence of numerous external URLs suggests a potential distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

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://jumiwimov.ru/award?keyword=allergic+reaction+treatment+pdf PDF link annotation
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/e38074ea3.pdfIn PDF document text
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/julurakiw.pdfIn PDF document text
    • http://rezltml.xyz/zeperilugisopirinivlxt7.pdfIn PDF document text
    • http://abreudesigns.com/zopujedixixelogusvjv7.pdfIn PDF document text
    • http://ag-management.space/electric_and_water_meter_reading_worksheet8v21l.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/0b65f7e.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/togijivogebibolo.pdfIn PDF document text
    • http://erkutungotu.com/zombie_kush_ripper_seeds_seedfindert7evk.pdfIn PDF document text
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/1195600.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/0f02a7.pdfIn PDF document text
    • http://all-system7.club/ladupato9uhk9.pdfIn PDF document text
    • http://starkrobotics.org/domilasawevasazumasajl761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_600a0a138e00a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fe7cb4a7369a.pdfIn PDF document text
    • http://akmurzina.com/zuxegabuvixosoxulij5286.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/power_cooker_plus_cooking_beans.pdfIn PDF document text
    • http://servicesforsupport.com/fobemesukorufidituzejagigm29vn.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/4745400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/22507339572.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_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 5284 bytes
SHA-256: b400e0d670004e2901e7f745770e75a09818c740ab7ae9e007e5169230330820

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