Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6e855ccfa7072e…

MALICIOUS

PDF

77.2 KB Created: 2021-04-02 07:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a3cd22e34240ccad244744b77e4da07f SHA-1: 8f2f806bc5af0d7cc1ddab0cb6c492e3e3477602 SHA-256: 3e6e855ccfa7072efc489c0dbbf0d940b4a62e1736e5fe96f2968a7a59bf3aca
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document employs SEO link farming and redirectors, disguised as sheet music, to lure victims. Heuristics indicate a high likelihood of phishing and malicious intent, with ClamAV detecting it as a phishing trojan. The embedded URLs likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=you+raise+me+up+piano+sheet+music+with+letters PDF link annotation
    • http://pakunobun.getenjoyment.net/luwerurixurixupe.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/fifebakefofezuvumoviz.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/bonoturosakowi_kewikote.pdfIn PDF document text
    • http://latuha.com/how_to_make_garlic_parmesan_crust_pizzamv99d.pdfIn PDF document text
    • https://paruleponovaro.weebly.com/uploads/1/3/5/3/135389889/mudatalizu.pdfIn PDF document text
    • http://vanlit.ru/gikudoboba10soi.pdfIn PDF document text
    • https://zodefamebatum.weebly.com/uploads/1/3/5/9/135967531/4542996.pdfIn PDF document text
    • http://monoga.space/58540514285bjvas.pdfIn PDF document text
    • https://figuzenage.weebly.com/uploads/1/3/4/4/134472600/e209cc.pdfIn PDF document text
    • http://photoforce.ru/wild_shape_guided17fy.pdfIn PDF document text
    • http://scarcebook.com/dumb_ways_jr_zany_s_hospital_aptoided080m.pdfIn PDF document text
    • http://subakegewoje.sportsontheweb.net/10329301322.pdfIn PDF document text
    • http://ch-redirect.icu/9602528822219twi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/the_dark_tower_cast_1943.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bigo_live_free_new_version.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/latipusifexikatudubi.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/forged_in_fire_season_1_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/awadhesh_premi_ki_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/xowemozikeviwexo.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/how_to_print_entire_dataframe_in_python.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/11525228464.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/construction_building_information_modeling.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5224 bytes
SHA-256: fc373f8a39d7454520cb4555716cdff795da4e3dcff09e70c47362f14003a782
font_01_sfnt_off0001026b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 10632 bytes
SHA-256: 975e2dad061fe3f126edc188c7a0f4365537142b41742b17f6bce33abc8a3799

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