Malicious PDF — malware analysis report

Static analysis result for SHA-256 d625bce7b577debe…

MALICIOUS

PDF

75.4 KB Created: 2021-02-20 14:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62f2c7f1768543130063ffb84925855e SHA-1: d47cf19920670ad3fc5a10c9124a396c859db844 SHA-256: d625bce7b577debe39ed550769307e1576e9cf0c52eefbb604db9dd29bfdcf9c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm, with one prominent URL leading to a lure for 'Python programming ppt free download'. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. The presence of embedded URLs and the overall structure suggest the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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 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.
  • 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://baarspo.ru/strik?utm_term=python+programming+ppt+free+download PDF link annotation
    • http://alphabitx.com/adirondack_canoe_mapmlb1i.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/cFjjihv/98548778569.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/LUifhaH/smasher_crusher_zombie_killer_beer.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/0mgrhgd/criminal_case_search_miami.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/4247392.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/can_infinity_be_a_limitu1gzu.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/7936005.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/c4kjdrC/fast_and_furious_spy_racers_rio_characters.pdfIn PDF document text
    • http://velesvoyage.ru/cat_simulator_kitty_craft_mod_apkwc9cw.pdfIn PDF document text
    • http://trynon.xyz/video_cutter_mac_freeqlnhd.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/2901430.pdfIn PDF document text
    • http://excellent-spb.ru/yasin_suresi_bilgisayar_hatl3skwk.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/79703402697.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/altair_inspire_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/27413898707.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/kesigemajulur.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/fees_must_fall_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/zozuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 1684 bytes
SHA-256: c47328b99d1a8106722297ddf3976446a0c29354b3be907203f77db8ad888c37
font_01_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 5472 bytes
SHA-256: a4860f64984b4e60f9e81c29befadddd70bfb42b85065669347b3a5e7d2acfb1
font_02_sfnt_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 12636 bytes
SHA-256: 3347c0e7d4f847970728b7e8f0891c127eb1f448987765f3737bf41418ec7ed6

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