Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f901849bfd5c748…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 03:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2ce4ae61bc88dbe92a3038275eec6b7b SHA-1: dcdf667484a50ef7ad20e9e191604fae3788ecda SHA-256: 6f901849bfd5c748e6b81857b09e06e220aaf6458dbb8af627b1fe8b928a0e9b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=paper+menagerie+and+other+stories+pdf PDF link annotation
    • http://povisowalikim.scienceontheweb.net/dewalt_miter_saw_12_inch_manual.pdfIn PDF document text
    • http://liko-sneakers.com/the_godfather_coda_the_death_of_michael_corleone_watch_onlinerydk0.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/zakuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ePjgfhj/theri_baby_song_masstamilan.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/jubivulukat.pdfIn PDF document text
    • http://medicinfo.online/gikiruniwanogigi2shtr.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/witonutavepejif.pdfIn PDF document text
    • https://nenuvive.weebly.com/uploads/1/3/1/4/131483155/bewar.pdfIn PDF document text
    • http://auto-fishing-rods1.club/95959784064bllvf.pdfIn PDF document text
    • http://ritual-venki.online/pdf_hardware_and_software0lcmn.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/mUhgihK/wegesijekupe.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/b69acec7866866.pdfIn PDF document text
    • http://artelamp.store/485012225715yjbl.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/hfghKGS/zarefomatexekagemos.pdfIn PDF document text
    • http://aydym.club/271257569821qfva.pdfIn PDF document text
    • http://baranaydin.org/meredekenige9xljz.pdfIn PDF document text
    • http://1xbet-football.fun/fedapudinodoziowgd.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/9453978.pdfIn PDF document text
    • http://bu-markett.com/the_chrysanthemums_by_john_steinbeck_full_textxqyer.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/pdf_page_splitter_apk.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/zebinivinanuvufaf.pdfIn PDF document text
    • http://limons.space/battlerite_change_name4j98s.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://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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 5212 bytes
SHA-256: d1bf245a771c94ea48e13510c6c77f1a18f162334f68e4c70da24bc73e8b5248
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 11536 bytes
SHA-256: f56cb7d510090b8578af1adbb0a12ba2a72916e3f50a5620ea9c311be37423b9
font_02_sfnt_off00011a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A68 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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