Malicious PDF — malware analysis report

Static analysis result for SHA-256 e062fb82aa97a4ea…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 14:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f059547811a19b282b10f7f7259aa109 SHA-1: b5f60f40d28d651822dd83f8001d8e1fe8f1941a SHA-256: e062fb82aa97a4ea5947c0683673eb118e1535e44f9f416ca61b5d2482bc0a1f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+sew+flying+geese+easy
    • http://twitter-center.com/garmin_vivosmart_4_battery_drain8fuq1.pdf
    • https://cdn.sqhk.co/rawuredilu/6Yibjca/bujafuvakuselujasej.pdf
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdf
    • https://cdn-cms.f-static.net/uploads/4485693/normal_600c66011f172.pdf
    • https://static.s123-cdn-static.com/uploads/4366366/normal_600021590dd2a.pdf
    • https://cdn.sqhk.co/gigifojorax/gjijeu2/bloody_bastards_hack_apk.pdf
    • http://navaram.online/ufc_fight_tonight_time_centralh5d4e.pdf
    • http://bebetadiruj.mywebcommunity.org/japabukaf.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fc7f24c15f63.pdf
    • https://cdn-cms.f-static.net/uploads/4490757/normal_602eb607807f2.pdf
    • http://dajobod.getenjoyment.net/hp_12c_platinum_financial_calculator_app.pdf
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6020d20185eae.pdf
    • https://cdn.sqhk.co/pixazizaze/igegc3C/cooking_fever_pc_update.pdf
    • https://cdn-cms.f-static.net/uploads/4463528/normal_603904de6651a.pdf
    • http://b4shop.icu/972417383369xcb4.pdf
    • http://verifybadgesbusiness.com/nimomekuve41s8.pdf
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6018b15088ca8.pdf
    • https://cdn.sqhk.co/kagixepo/7gdic3f/du_application_form_fees.pdf
    • https://static.s123-cdn-static.com/uploads/4476432/normal_60019485ee9b5.pdf
    • http://xunopapazugatar.medianewsonline.com/artritis_idiopatica_infantil.pdf
    • https://cdn-cms.f-static.net/uploads/4421056/normal_6019afe1925a4.pdf
    • http://leree6.club/xuwusuz54zk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/115418ea-870e-4beb-9276-256aad1b5618/what_is_a_good_curriculum_for_preschool.pdf
    • https://uploads.strikinglycdn.com/files/1d16626f-bea8-42d4-8e82-2943a366ec8e/does_verizon_have_any_specials.pdf
    • https://uploads.strikinglycdn.com/files/d0961f25-106c-4a72-9a57-50a0bece02c3/duwarubibadajuno.pdf
    • https://uploads.strikinglycdn.com/files/ef77bc91-59d6-4e1a-b55a-8175eb52c951/plan_de_negocio_en_ingles_traduccion.pdf
    • https://uploads.strikinglycdn.com/files/e91c6036-a969-4d3e-8146-3ad0c5104202/fifty_shades_of_grey_teil_3_im_tv_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f589.bin
fe440df0a41932c177954e3f1640ba7b80e3a306cb215f073ad9e51ce434475b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 4992 bytes
font_01_sfnt_off000106b2.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 1800 bytes
font_02_sfnt_off00010f40.bin
8b3aac8cdbcef16fa19bb9a3938e5f9383f9017221895ef83318f5b61c80177a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 10992 bytes