Malicious PDF — malware analysis report

Static analysis result for SHA-256 933eac7430b5a56e…

MALICIOUS

PDF

73.6 KB Created: 2021-02-27 04:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f6cc4a5eeb83ad99ed0547e494f4846 SHA-1: 02299a890aa94a58addee2a6c2ff9a7ddfd09f99 SHA-256: 933eac7430b5a56e7f954eac4741bbc0f9dbcf3bd4789899296ae92f97e94a70
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains keywords related to 'art' and 'child development' which are likely used as lures to direct users to malicious URLs such as https://midufefew.ru/award?keyword=how+art+helps+child+development. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9799

Heuristics 4

  • 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 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://midufefew.ru/award?keyword=how+art+helps+child+development PDF link annotation
    • http://nesobaka3.xyz/53182537183voqwt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_60373a0e9f91a.pdfIn PDF document text
    • http://prod-fruit.space/what_is_wrong_with_my_dyson_vacuum1c0ki.pdfIn PDF document text
    • http://hs-life.ru/dujedutozoveb36zk0.pdfIn PDF document text
    • http://onlinetyz.xyz/is_prostitution_legal_in_nevada_usahwe4x.pdfIn PDF document text
    • http://torevifij.iblogger.org/migotus.pdfIn PDF document text
    • http://mpvideo.org/plunder_pirates_hack_ios6q0d9.pdfIn PDF document text
    • https://refugisedenofa.weebly.com/uploads/1/3/1/3/131380322/vuterokapig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_6026a2878f2f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_600d6fd7be4c3.pdfIn PDF document text
    • http://rometinanuk.iblogger.org/acute_heart_failure_management.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/c2862f62b84f.pdfIn PDF document text
    • http://bavomobes.22web.org/nofedewemitumu.pdfIn PDF document text
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/1206f4bbcb7b980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temomij.epizy.com/44356632268.pdfIn PDF document text
    • http://joxumokuri.epizy.com/cgaffinetransform_rotate_and_scale.pdfIn PDF document text
    • http://mofububozej.rf.gd/38218074850.pdfIn PDF document text
    • http://posidepixofonep.epizy.com/29286711928.pdfIn 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_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 5424 bytes
SHA-256: 98c1ca380c1479c6ca4032fb4e58c03468500052bd36632389dff3c2eb4abc91
font_01_sfnt_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 9764 bytes
SHA-256: 7d418d18b8f281d4b4708a5f35b01477c7f2462617d3e992e3ef42a2f9058d37

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