Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ccbfce40eedcc5…

MALICIOUS

PDF

95.7 KB Created: 2021-03-29 14:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 802d1722a8a800b5272253ebad91b982 SHA-1: 640b0581b73bfc051c5777b4b3d22a58f8736d5d SHA-256: 32ccbfce40eedcc5bcc832e28b21dbc539f5500ea150241da34cf28902b8f197
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://botokaw.ru/award?keyword=catalan+atlas+pdf PDF link annotation
    • http://salestore.pro/alien_shooter_2_apk_unlimited_moneyog4d6.pdfIn PDF document text
    • http://avtoshkola-region26.ru/chemistry_dictionary_java_game7ip02.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/gijiaig/zulorujumugeduroleworuran.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/Xjc1Dmj/84142815760.pdfIn PDF document text
    • http://varietystore.website/acura_rdx_2008_manualcoiyw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_3f3bd13d9ef948e7a60a11c06fc2cd27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84bd8d34-2018-47a2-ab0a-e3b0da2360ca/72580948430.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_14a3b0e60c674d51b0cad7434d94a16e.pdf?index=trueIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_2ec75d283aa943e7a9b7cb98a3e0ac90.pdf?index=trueIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_c7804439056b498cb490021c6c329a5a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5af36c-802c-4d0e-80af-32ea8bcc158a/16053015538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367a9fc2-8641-4d28-a5e1-021965cce4ea/werewolf_the_apocalypse_20th_anniversary_edition_merits_and_flaws.pdfIn PDF document text
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_aeef902ddbcc4a2c81fc9b5e49916a75.pdf?index=trueIn PDF document text
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_d5c66f429e4f4ad983a0693165541eb2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/32973793779.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/diablo_3_season_22_start_date_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44523ee-3fb1-46c6-8898-d0b3d8ace77c/ruudglas_pacemaker_water_heater_leaking.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 4844 bytes
SHA-256: e8a12bea1bedc1c9b448eb264bfd1b0010128f983741c16fcc81b93f72814b5e
font_01_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 10408 bytes
SHA-256: 98dd797457dc9153a5fde059a832a6922f672ad2a5e362a148a0a1511bbe79fd
font_02_sfnt_off00015abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ABC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501