Malicious PDF — malware analysis report

Static analysis result for SHA-256 b372f32e284a4e0e…

MALICIOUS

PDF

64.1 KB Created: 2021-01-31 02:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7ec492c712091d96ffbd41d0258341b3 SHA-1: ad9dab7708764cb6e2c67f7c41d469e91fa2fef4 SHA-256: b372f32e284a4e0e339129cf7e172416af86aa9ebb2c5d4963b22f35932bd102
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this file as malicious, specifically a phishing trojan. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://trafffe.ru/wb?keyword=stop%20the%20killer%20robots PDF link annotation
    • https://tezigawoje.weebly.com/uploads/1/3/1/3/131379443/larokonebibijelu.pdfIn PDF document text
    • http://ijmalan.xyz/bivebukuseriwatepowefll2.pdfIn PDF document text
    • http://paringljkf.com/old_time_gospel_songs_listvtaf2.pdfIn PDF document text
    • http://lumacy.site/gebowizozagomodowoxndh7n.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/bjjchd4/hockey_wallpapers_for_samsung.pdfIn PDF document text
    • http://instofficial.online/jikafezs37uz.pdfIn PDF document text
    • http://copyrightreports.com/my_movie_windows_live_movie_maker_tutorialnxm53.pdfIn PDF document text
    • https://cdn.sqhk.co/kowazodonaf/hLhhPid/89295736823.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/XRhd6MF/ice_hockey_nintendo_game_online.pdfIn PDF document text
    • http://upgrade4me.com/best_romantic_love_ringtone_mp3_download3lpow.pdfIn PDF document text
    • http://bonboxstudio.com/finding_slope_practice_worksheet_answer_keyosmcn.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/Ahi5iaf/xopumapawurebisirosop.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/h3PSDif/97694542457.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/ehgWihd/lekunirakagipubijojoj.pdfIn PDF document text
    • https://ribovaboj.weebly.com/uploads/1/3/0/7/130775049/990188.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/xedadezewusedibevub.pdfIn PDF document text
    • http://my-favshopg.online/carnival_ring_toss_rules2q18n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB504 4688 bytes
SHA-256: bca86b2bd394b197b825870f6c8c50a432285bfe26933da70fccb98173c8feea
font_01_sfnt_off0000c4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 9508 bytes
SHA-256: 09b8c2fd698bd46cb8a92bd071c80682a5a1cb488a4a74160f3edbf324441fc0
font_02_sfnt_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.