Malicious PDF — malware analysis report

Static analysis result for SHA-256 209ee866b0531945…

MALICIOUS

PDF

86.2 KB Created: 2021-05-11 08:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 622592b0154080893c2fd43981ba2c6b SHA-1: 9ea742caf024b3804485781198b397cba7085351 SHA-256: 209ee866b0531945a9c4e6b212397df490b278cdcc7980a88ae46a92cda9f6d3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The presence of multiple unknown URLs and a ClamAV detection for 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=how+to+connect+mpk+mini+to+mpc+essentials
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/c18fc7af.pdf
    • https://cdn.sqhk.co/sadebupunen/ifxUher/race_car_io_game.pdf
    • http://carinsusa.info/minimal_cut_set_algorithm508em.pdf
    • https://cdn.sqhk.co/jigitovewuk/ExKTzgc/ton_t_binh_phap_va_36_k.pdf
    • https://cdn.sqhk.co/toxotunem/aYhh0HM/11683400947.pdf
    • http://azules.ru/rasizug6kbd0.pdf
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/72cd70d12ded.pdf
    • https://cdn.sqhk.co/kovixileta/idheoUB/best_barcode_scanner_app_for_comparing_prices.pdf
    • https://cdn.sqhk.co/dekorasenu/WMDsbhf/avalon_high_book.pdf
    • http://douchehq.xyz/5018974611b6c45.pdf
    • https://cdn.sqhk.co/koditisalupe/8FoL62w/shadow_legends_stickman_revenge_hack_apk.pdf
    • https://cdn.sqhk.co/giganopof/lifHie3/the_adventures_of_tom_sawyer_play_characters.pdf
    • http://gufutaca6.xyz/winnie_the_pooh_book_set_amazonj60jn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_dcb0d6aa40b24532b70854c0c6cb6588.pdf?index=true
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_f1a1d82f340a47bf84a5097728219d93.pdf?index=true
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_ff77a8018ae546d98173b87dc4415ce1.pdf?index=true
    • https://s3.amazonaws.com/besafefaf/31992878699.pdf
    • https://s3.amazonaws.com/warapagefasovi/what_is_cutover.pdf
    • https://s3.amazonaws.com/gulapore/callus_formation_in_plants_ppt.pdf
    • https://s3.amazonaws.com/welanisowari/lg_hbs_820_vs_835.pdf
    • https://s3.amazonaws.com/fixararololu/adidas_goalie_gloves_size_guide.pdf
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_bd9ff316825146d8b37e345eeb2f3dbe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105af.bin
b022684d4bca7fb43fd2ddaf7a6c44486ec23ef04672c28a0597147080436ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 4888 bytes
font_01_sfnt_off00011639.bin
aca9a8a9e34535c73da0cb939b0bdf042df2006587d1215d3e8acbca7be6f107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 10764 bytes
font_02_sfnt_off00013af2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF2 4324 bytes

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