Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4603ac54ebb6b66…

MALICIOUS

PDF

96.3 KB Created: 2021-04-02 22:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8d007623ed43d3e850e8d28466fdee SHA-1: 73d6112fbabf1993dd9319c8d80f8478fc1b55d6 SHA-256: d4603ac54ebb6b66fa7b30e8ba9d12c91658bc39ddcce088ab85aee96c386132
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to 'Remstar auto a flex m series change pressure'. No scripts were extracted, but the presence of external URIs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=remstar+auto+a+flex+m+series+change+pressure
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/6005734.pdf
    • http://toxedajenoxin.66ghz.com/zoket.pdf
    • http://carins.info/drum_beat_patternsx2m8n.pdf
    • http://kino-vezde.ru/vuguguremoredumxop0.pdf
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/d7d4e6.pdf
    • https://melesanej.weebly.com/uploads/1/3/1/1/131163783/7035100.pdf
    • http://13millions.store/lugujdum3z.pdf
    • https://cdn.sqhk.co/govamopega/6dnfJaI/zombies_monsters_robots_2019.pdf
    • https://cdn.sqhk.co/dokukavifig/jbii4RP/15188672958.pdf
    • https://cdn.sqhk.co/doxurozupu/jhbQNja/eae_cable_tray_catalogue.pdf
    • https://vitojeji.weebly.com/uploads/1/3/1/4/131453493/0782d5.pdf
    • https://cdn.sqhk.co/pesofesidoke/RdhcibZ/fegalibirokuzujif.pdf
    • http://mini-cam1.club/pearlvine_international_planhlf4u.pdf
    • http://julaximufe.66ghz.com/hindu_baby_names_with_meaning.pdf
    • http://creditinquiry.info/sevoruruvuvlppe.pdf
    • http://istlan.space/ginalopelutuxefulizvhf33.pdf
    • http://detelibizonibi.22web.org/antoine_equation_table.pdf
    • http://winclean-shop.space/76439820369maa9y.pdf
    • http://wonder-ita.space/pottery_painting_birthday_party_near_mezgo89.pdf
    • https://cdn.sqhk.co/kujexelorite/ijfp7A4/25305568620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fupuzujovo.epizy.com/51994005424.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_off00012b37.bin
12e9e53aff259fa74ab806f673070bc46061b8430d9cbbc767a3da510da93cb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 5388 bytes
font_01_sfnt_off00013d70.bin
c41b6db36a2a976f5e235a50a48f92b98d41fed1ed64c6d073402acd52e057ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D70 11288 bytes
font_02_sfnt_off000163a2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x163A2 4324 bytes