Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b826b7f25d46fb5…

MALICIOUS

PDF

72.8 KB Created: 2021-01-05 06:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 599ecc0f329f72253d9e353796639f37 SHA-1: ba540938921049eb09c019bb7e6936682aa5f517 SHA-256: 2b826b7f25d46fb568ee53cc70e2ad9b497878111ac12b5d9f92964be0440206
222 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs point to known malicious infrastructure and link farms, suggesting an attempt to distribute malware or phish users. The document body, though heavily obfuscated, contains references to game mods and walkthroughs, likely serving as a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=assassin%2527+s+creed+identity+mod+apk+game
    • https://cdn.sqhk.co/fogobewataja/D6p3Lij/topij.pdf
    • https://cdn.sqhk.co/wuvotalek/4Lhdhfu/mr_love_queen_s_choice_victor_walkthrough.pdf
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/6696494.pdf
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/mowonifeferofa_turivora_gasumajaxet_tixunazigora.pdf
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/jokeminivez_rofuzemam_lisotab.pdf
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/mosuvifedidapeposulo.pdf
    • https://tozifurijusewo.weebly.com/uploads/1/3/4/8/134850353/e60f5bd3a71.pdf
    • https://cdn.sqhk.co/bebetirifam/Tsomtja/play_earnings_date.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cacc3189-db9e-4995-b247-1c02202140fd/garner_middle_school.pdf
    • https://uploads.strikinglycdn.com/files/ef5a59d9-b1a0-49b0-957a-870a7f454deb/71474007070.pdf
    • https://uploads.strikinglycdn.com/files/0fcdec7a-d6e8-45dd-acbb-b6f1b572e9a5/jupuxojigilaxeki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd15.bin
a55f9afb485acdc708d40f9486647a6f5fb769fedb13f99b868225fe957d14e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 5548 bytes
font_01_sfnt_off0000eff5.bin
0f482b23ab7e19535f5b4c050d4eacc2168b66a4b59a40a450d985b27927c643		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 11260 bytes

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