Malicious PDF — malware analysis report

Static analysis result for SHA-256 32894381a9e5703f…

MALICIOUS

PDF

71.3 KB Created: 2021-02-28 23:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a35e3ee1e957af4727072d631560556e SHA-1: 6bae3862a64429f8cc7dd353f6ab4b6f155936d2 SHA-256: 32894381a9e5703f6a552f16409f1590c06f0d9835773f65c1e4562f03e2b635
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URIs, with one prominent URL, 'https://resalured.ru/strik?utm_term=how+to+draw+a+dragon+eye+easy+step+by_step', suggesting a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to drawing tutorials, which is likely a pretext to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=how+to+draw+a+dragon+eye+easy+step+by+step PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fc7bb77bd908.pdfIn PDF document text
    • http://jukekabotika.22web.org/cerebral_palsy_phonetic_pronunciation.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/wriey02/noteloniritijivumafixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5fc6b4a748927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_600c3771ebe92.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/En0igN2/sri_lanka_police_radio_sound_free_download.pdfIn PDF document text
    • http://jukexufepezaj.22web.org/bufifelijapisu.pdfIn PDF document text
    • http://zasaluto.iblogger.org/arm_compiler_6._6._1.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/gfnmhhe/picsart_photo_studio_old_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/getjtig/98529618451.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bemuvubovewe.epizy.com/87668446861.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/bordelais_correctional_facility_application_form.pdfIn PDF document text
    • http://juxitogepamuwo.epizy.com/lajagenuzusinos.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/makikoju.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/2014_dodge_challenger_srt8_performance_parts.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/21643808534.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6E 5388 bytes
SHA-256: e4642f565a47800d894c65b68c5f2cc4ef0a5cb7bc27824c26d41c952b03a27e
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 10132 bytes
SHA-256: 12f593772dfbef7af9d8f8845e7cd4ffdda1674caa9376efa231ff94a1f27f1c

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