Malicious PDF — malware analysis report

Static analysis result for SHA-256 95db7af615cc5134…

MALICIOUS

PDF

72.8 KB Created: 2021-01-29 23:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 02c5d9400d508bc0cc9fa24a3b632022 SHA-1: ee4e460f54bc16ee7376d17aa36766963507251f SHA-256: 95db7af615cc513484b34b7ee969aa67e4db01ea672f06cd3c37cc524d2876b8
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, includes a subject line related to a 'response to literature outline', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://crophysi.ru/123?utm_term=response+to+literature+outline In PDF document text
    • https://cdn.sqhk.co/bulixanejad/gcjiX1b/graalonline_ol_west_download_pc.pdfIn PDF document text
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/fibijujupabewuz.pdfIn PDF document text
    • http://2gusevshop.space/homescapes_online_uk9abx8.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/xufefuvax-vetojat.pdfIn PDF document text
    • http://nakrutkavk.site/idle_galaxy_miner5xelg.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/7jcCIig/hack_game_score_hero_ios.pdfIn PDF document text
    • http://juniwasobevi.22web.org/tewerotonejupotusinup.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/0906ade638.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/jbgggeG/riruke.pdfIn PDF document text
    • http://helper-badges.com/codex_of_victory_sci-_fi_turn_based_strategyhgrsh.pdfIn PDF document text
    • http://dulexip.22web.org/spotify_apk_premium_terbaru.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://zesufes.epizy.com/47039540755.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/sifixiba.pdfIn PDF document text
    • http://kidojudal.epizy.com/12459335089.pdfIn PDF document text
    • http://sasotogatajuxiw.rf.gd/jumodevoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/shostakovich_the_gadfly_romance_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/89908543515.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_off0000d579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD579 4704 bytes
SHA-256: 4145f8ecda49cf78e02dc39049fcfbcf0a9c64b3a92ffc049e3381f1d220f278
font_01_sfnt_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 10244 bytes
SHA-256: ad22b9c58e0846de7e94eecfdee48b48019fda5ecfb2e7dcbc179f6b6c7b3828
font_02_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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