Malicious PDF — malware analysis report

Static analysis result for SHA-256 086356286992910c…

MALICIOUS

PDF

70.5 KB Created: 2021-03-05 07:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a35998c6d83c3fa9ba6c42d671eeccb7 SHA-1: 330b4af7a515807412cf3f0ffddee0365d3f2104 SHA-256: 086356286992910cd0ec27d2a66c5a0a6536e18510cbee78c3b9d52c44ac4a1b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically appearing as a search result for 'hodgdon reloading book 2020'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to distribute traffic to various disposable hosting sites, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=hodgdon+reloading+book+2020 PDF link annotation
    • http://paganel.world/vyapari_movie_songs0bvrc.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/iifhjWo/sculpt_3d_model_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hhd1hid/voruda.pdfIn PDF document text
    • http://setofexperience.site/sekosexajakalejij9diz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_60270522903ba.pdfIn PDF document text
    • http://remont-pc.website/putivefiraragukemuroxfobx.pdfIn PDF document text
    • http://sayseedokg.com/jeopardy_game_template_with_musicv2084.pdfIn PDF document text
    • https://cdn.sqhk.co/fofanibiv/gN0jdcW/black_friday_2019_deals_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/IjaHFGu/dark_dungeons_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469135/normal_5feb8824d852d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_5fda7e90595de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fcce88ccc7e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejusudoboriduf.rf.gd/gopixorubedowerefuviso.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/13443361386.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/chloroform_solvent_definition.pdfIn PDF document text
    • http://boxawigituwa.rf.gd/86165039147.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/bitdefender_antivirus_scanner_for_unices_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/melbourne_to_brisbane_road_trip_guide.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_358af94f0ba948308c170168ae3dd8e2.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_22185606c7b44c14aa9be49c440338e8.pdf?index=trueIn 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_off0000d6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 5252 bytes
SHA-256: a2f8acf8f19c1ec59cb8c50b5ac63dd8de2bdf75231957855f4172f890a66528
font_01_sfnt_off0000e8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 10556 bytes
SHA-256: 3b796cbe44279e4762ed306fc8bdb99b4b20a42bcc404d292d46869cf41ed060

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