Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dad3d3f050166af…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 15:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae1d8565f48fa6a866d429994aef9b7 SHA-1: 94e9440ea75003cf09acba239f1e0995266865c8 SHA-256: 1dad3d3f050166af0dff1359109a6d8c781e0e6bf0f8785170ce613d78df9ddd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to football regulations, likely intended to drive traffic to these external sites for further exploitation.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=reglamentos+de+futbol+resumido
    • https://cdn.sqhk.co/medipevagopu/bgHaxXK/26722724878.pdf
    • http://levotavo.scienceontheweb.net/17372914443.pdf
    • http://jolidulikan.scienceontheweb.net/reloading_bench_stool.pdf
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/4809271.pdf
    • https://cdn.sqhk.co/besuduxikuvo/hbNgggj/38023568507.pdf
    • http://duwinijuj.mypressonline.com/pdf_aristotle_and_dante_discover_the_secrets_of_the_universe.pdf
    • http://funasowuto.getenjoyment.net/59926531928.pdf
    • https://cdn.sqhk.co/vevajewez/M0q7Pic/disney_app_store_android.pdf
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/sizas.pdf
    • https://cdn.sqhk.co/pukojawutev/dIgdijE/clash_of_clans_best_air_attack_strategy_th9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_1ea56a9538d14632940b357b4b1500c0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ec11e40-66c7-41ca-b412-60668bce8e49/how_to_fix_ac_compressor_leak.pdf
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_a8c53d190d7843c087d4eaffc25fa7c5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/abfe2104-28d5-4415-b480-5bd87c6ba588/13231783026.pdf
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_54fbf56b4b674f86bee6e6e05a2a41f5.pdf?index=true
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_5c24f664c4b34c6faf04c9350df2e210.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66cc175e-c4fc-402e-8571-ac32d4975ea2/new_sat_math_practice_test.pdf
    • https://uploads.strikinglycdn.com/files/ba45b7ac-5d4a-4462-8ad6-39182fc6fbd4/siwaneterumusu.pdf
    • https://uploads.strikinglycdn.com/files/7b05bd81-6b6e-459e-a624-9166b1e870a2/espn_30_for_30_basketball_player_dies.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_ca1851c50a93410d9974ceff12c13716.pdf?index=true
    • 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_off0000f29c.bin
3ba424f62721def704b52d033c7726166a836fc3682750ac645cb61accce9e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 5372 bytes
font_01_sfnt_off000104d4.bin
900f3b0859a7af7b365e5e3990487a1c5bd0cd7ee0bcb4a72f708434581fe325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 11816 bytes

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