Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ab2a27dbadf35c…

MALICIOUS

PDF

109.6 KB Created: 2021-02-24 14:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 319f5bb025e6b5472fb63e866d7147f2 SHA-1: c01fbd321d55ded1f67c8c5ea759155cd8850a07 SHA-256: 27ab2a27dbadf35cf06ab037e0f81f437984a4ac84563c2e2380e5a528c20daf
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, flagging it as a phishing trojan. No scripts were extracted, but the presence of numerous URLs suggests a redirection or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9490

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=what+is+basic+theory+evaluation In PDF document text
    • https://cdn.sqhk.co/zimopaji/hMPSkha/arrow_going_up_png.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/ce0a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5fcae9cbcd4c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5ff361839f4c0.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/nuwelufe-jejopatusiwu-punadifotujada.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/aGHODji/rimipodidonexafaj.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/cIid2dM/verufaxifotivinarux.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/FgghQAY/lucky_life_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5ff18c66b4457.pdfIn PDF document text
    • http://ribuvegiruni.iblogger.org/flexform_cestone_console.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_60015ddf374ec.pdfIn PDF document text
    • http://modunup.rf.gd/adventure_game_for_pc_softonic.pdfIn PDF document text
    • http://felawikemuda.epizy.com/piano_sheet_music_tyler_the_creator.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/kepupogu.pdfIn PDF document text
    • http://bawatusarab.epizy.com/google_android_developer_tools_adt.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/5142872897.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/how_to_reset_pioneer_mvh-210ex.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/27708013177.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/19754479036.pdfIn PDF document text

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