Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c27e9ad0edb1fdd…

MALICIOUS

PDF

79.8 KB Created: 2021-03-31 14:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2ab91853a623567b8da5370d0cd60e SHA-1: 6dc52d2c2f49a6fe6c56617db5052fc24c259d70 SHA-256: 2c27e9ad0edb1fddb1cdf9c37bff786f267940a16e00fc7eedbfa1d8cb613288
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary external URI points to a URL that appears to be a search result for a BMW X1 service light issue, indicating a lure to attract users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://kuzutuzo.ru/strik?utm_term=how+to+turn+off+service+engine+soon+light+bmw+x1
    • https://cdn.sqhk.co/dawezizupata/dX1iche/influencer_meaning_social_media.pdf
    • https://cdn.sqhk.co/pubamegumox/cD3OP2T/fall_guys_running_poorly.pdf
    • https://cdn.sqhk.co/suxujaba/Mggjgha/67525883267.pdf
    • https://lipojiwogim.weebly.com/uploads/1/3/0/7/130776075/fudetajewafuwek-fabumukunif.pdf
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/7404332.pdf
    • http://xitodefigatefuj.medianewsonline.com/formula_del_volumen_de_un_prisma_de_base_triangular.pdf
    • https://cdn.sqhk.co/wenoxavawo/QkoGidp/gonawozisu.pdf
    • https://cdn.sqhk.co/rapovixovuti/dOicggb/digipay_commission_chart_2019.pdf
    • https://cdn.sqhk.co/wuxobilan/agdfRFa/12204616703.pdf
    • https://poliradu.weebly.com/uploads/1/3/5/9/135991332/xupizozarak.pdf
    • https://cdn.sqhk.co/laxegipo/2jajioj/play_tube_e_video_tube_como_baixar.pdf
    • https://cdn.sqhk.co/devuzemalut/mDGhfhh/57374946940.pdf
    • http://pakizimavom.scienceontheweb.net/the_titans_curse_chapter_13_summary.pdf
    • https://miwebuzoz.weebly.com/uploads/1/3/4/0/134095964/wujozo.pdf
    • http://mopewogubit.getenjoyment.net/bier_block.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/58d910e5-f171-4626-a348-d3d8eafed2c9/identifying_phases_of_the_moon_iii_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/5ba706b7-dac3-4db1-911b-073d0af174a1/baby_gap_outlet_stores.pdf
    • https://uploads.strikinglycdn.com/files/0ae659c6-1006-4bd7-aa94-ca9ebb0387f9/wekaxefifoximurat.pdf
    • https://uploads.strikinglycdn.com/files/97753eaa-0946-4c27-a320-238570dfd0cd/63726281179.pdf
    • https://uploads.strikinglycdn.com/files/49d87307-af04-4831-865c-c3c3ddc2d025/58035865025.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_off0000f98b.bin
7c2fa9bef790b38a76292d8c17bf3f1ade2d370ad0b4e217e8cf523cd98afe14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 5456 bytes
font_01_sfnt_off00010c17.bin
f70a9cc12fba04652c0e3062de23e3662ee1749989fef35ecc5c691c9e054efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 11088 bytes

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