Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fe35e137a31a9c…

MALICIOUS

PDF

77.9 KB Created: 2021-04-05 08:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a0ac0a03391b5b4e85474b7d5cad0885 SHA-1: a502d72981cef70b6a033e20affabd32095f1183 SHA-256: 94fe35e137a31a9c3ee6e5d34d95ebebca6963f906914eddffdbc8136b735606
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a significant number of external links, many hosted on disposable domains, characteristic of a link farm. One prominent URL is https://crophysi.ru/strik?utm_term=us+stock+market+open+time+now, which likely serves as a lure or redirects to a malicious payload. The presence of embedded JavaScript, though not fully analyzed, further supports the malicious intent.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=us+stock+market+open+time+now PDF link annotation
    • https://cdn.sqhk.co/difixoruze/haieAQX/cara_daftar_mysejahtera_check_in.pdfIn PDF document text
    • http://judijemavup.22web.org/free_autotune_apps_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/b1whbij/robupewifipemawoxog.pdfIn PDF document text
    • http://meselur.22web.org/rizijimixif.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
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_e7b43868872245d69dd27368fe224b1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/serenity_prayer_in_the_bible.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_5ea3e353669146aaa9adba64cbd173fa.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_9cee069dd1564f748d021e077aa646c5.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_3a995b1d62c54aaea91ae9202326423f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88316e67-3b1e-407d-95ae-5c459cda082f/zijede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ab8fd1-defe-4b0b-bae0-d0e60d28bc23/govivotolutexezinavifavep.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/kovefogaza.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_dfa569d2bb924e159ffc419d11eea456.pdf?index=trueIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_586d5cb293b94ac0aec9096714c1fc6a.pdf?index=trueIn PDF document text
    • http://jusudab.epizy.com/balufapeletevoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d7d118-8cce-459a-9b90-667c4cca1e6f/setting_up_your_fishing_pole_for_trout.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_23b40fc48dda4a5bbd0b3f8de27ddabd.pdf?index=trueIn PDF document text
    • http://janojunotoz.epizy.com/518674527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204f5a0c-2fb1-4286-a3f1-8bb051cdbc2b/54610460973.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_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 4984 bytes
SHA-256: 033a7451ac34bd404f43a813b42f1009d786dfa6432e74e89dda74ee5bac7b6d
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 11072 bytes
SHA-256: e65e1526588e014ed1b28f0039296d98badcfb067d8b29ae1ad0b9ff34a45b28
font_02_sfnt_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3