Malicious PDF — malware analysis report

Static analysis result for SHA-256 a200ead416c2a737…

MALICIOUS

PDF

78.3 KB Created: 2021-03-01 14:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b303fb19da88ada8b81d7334109d87cf SHA-1: 12d82285ef2cb95fab1afee809a744de31d955f7 SHA-256: a200ead416c2a737c16b1f49c7185a8facdb4d9e93c52f22dc0e0f21c6744172
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that might be used in lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/award?keyword=a+river+runs+through+it+quotes+and+page+numbers PDF link annotation
    • http://iminn.ru/2000_mercury_150_efi_fuel_filterodxvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_601a72569c96c.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/xefevulevobakor.pdfIn PDF document text
    • http://dajexori.mypressonline.com/americas_test_kitchen_freezer_recipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5ff5037961409.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/27387448291.pdfIn PDF document text
    • https://pisaloxonuk.weebly.com/uploads/1/3/4/3/134391291/xiwivifizogimaduz.pdfIn PDF document text
    • http://alex-chekalev.com/nudexozipidokawfkum.pdfIn PDF document text
    • http://bratskpravojur.ru/733569475317use2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5fd9c494ddf0d.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/dbx_driverack_260_manuale_italiano.pdfIn PDF document text
    • http://presentinsta.online/agility_ladder_drills_for_hockeyg2qsy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://namepafubi.atwebpages.com/2254100506.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/alliance_air_conditioner_user_manual.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 5540 bytes
SHA-256: acdc2d44ff9d8940ebfd6a6a86909ff7c9800dc35fe850eb1ba513297906ece8
font_01_sfnt_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 10208 bytes
SHA-256: ef7a7e3c3bc80531123cc03fc571cc53135785f04843d2d0c9e19adb4ba71a5c
font_02_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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