Malicious PDF — malware analysis report

Static analysis result for SHA-256 27491c0ddc856305…

MALICIOUS

PDF

78.6 KB Created: 2021-02-24 22:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9045de8983db6ff844504279c4507aac SHA-1: c2e8e4db19ec192795ad3da3a72612d4b39a6f0d SHA-256: 27491c0ddc85630530cd375e4d0a2b58a00da960f4a311a81f9124ff6a4e39fa
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, contains a lure related to a 'Westinghouse tv 32 inch smart tv manual', which is likely a pretext to encourage link clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://bologen.ru/aws?utm_term=westinghouse+tv+32+inch+smart+tv+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409256/normal_5fdcb7d5d87e2.pdfIn PDF document text
    • https://dizilezojo.weebly.com/uploads/1/3/4/2/134234798/7302471.pdfIn PDF document text
    • http://terugate.mypressonline.com/ge_digital_timers.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/rojagizajatutilenagasuw.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/robin_hood_movie_2018_actors.pdfIn PDF document text
    • http://nelodorofi.iblogger.org/32428151107.pdfIn PDF document text
    • https://xuxufidumexed.weebly.com/uploads/1/3/2/6/132681394/2029cd6b2c47.pdfIn PDF document text
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/d87b80a59a1c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_60164a7aca778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd0e4271ee40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_6027241c62fad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386354/normal_5ff16f87238bb.pdfIn PDF document text
    • http://sujatafuluwariv.22web.org/maritime_navigation_apps_android.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/4514432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_6034ebfc1c058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_6032b83a4bf44.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/35555402563.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zakivijojinikij.epizy.com/64253041490.pdfIn PDF document text
    • http://lugubukegi.epizy.com/rasosuvexosebejal.pdfIn PDF document text
    • http://wudokuzogikozu.rf.gd/cushing_s_disease_endocrine_society_guidelines.pdfIn PDF document text
    • http://gelodolisez.epizy.com/java_vm_64_bit_windows_10.pdfIn PDF document text
    • http://tenowuwewid.epizy.com/xepumosebodimurujobuf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 5580 bytes
SHA-256: 6ac3c44840aa95963a2d418025ba645e869dcbb0b125285ac384b799a6bf51be
font_01_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 11076 bytes
SHA-256: 4c0f6b3a37347c34b037d4effe44411d982ff8fb7697d79869cf5466ff02d5f2

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