Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b9d14fe82aa7f5…

MALICIOUS

PDF

77.2 KB Created: 2021-03-04 16:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 57e3caff096297244cd1d034d522572e SHA-1: 707f16aaa52c7a41e4a8b6388e9950937e160f78 SHA-256: 01b9d14fe82aa7f5fe697059d16664e6648d745a1f27c9e962c08174995e8deb
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing. The presence of numerous external links, including one to 'soxebez.ru', suggests it may be part of a link farm designed to redirect users to malicious sites or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/strik?utm_term=2013+dodge+charger+rt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5ff40d6b8e54d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_603b834140a18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_6035cb61af19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_5fd9b624bb29e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6eab4fe-244c-41a3-b78e-dc0280f84911/setivifimar.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/bilyoner_android_indirme.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_21b2302f7c5f4eeda5bf47f7e6758b20.pdf?index=trueIn PDF document text
    • http://palalujopaxuv.epizy.com/85695945577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38696d1-1f6a-4ca6-a4bc-bba9ed766ae7/manhattan_gmat_books_6th_edition.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_523c52e0c82a4bd5a8501cc7d620fcd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d5a1c6-e5df-4733-a6c7-d883696dc855/2500183476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2f683d-fec5-49da-b95d-e797695a7a05/dog_man_and_cat_kid_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/camila_cabello_shawn_mendes_song.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_e7525b2551db433f858afead7bd8d3da.pdf?index=trueIn PDF document text
    • http://diwejijozijigez.rf.gd/ff14_crafting_gathering_guide.pdfIn PDF document text
    • http://gizadopozi.epizy.com/trasformazione_libbre_chilogrammi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8749befb-201a-4d7d-8f5c-1d9271c9d03e/faxogijot.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/rational_fasting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b841f1-ccf2-47a6-9d62-9a77b92c30bb/bofezabar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b300acd7-4890-4bb9-89d2-302ae624ea61/x3_terran_conflict_xtended_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/7666166293.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_cb39941747af42eb8f02f63165d2a62b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50cef9f-1d53-47c2-8e3b-67db1707ef56/should_counselors_wear_masks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117d633a-c306-43a0-b231-dfcaaa231ea8/19659374035.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_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 5384 bytes
SHA-256: 99f4178a8839a83008e828bca4ec2eb879f7d889bcb8fbc4ce8962e336b93d2d
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 10636 bytes
SHA-256: 178c6cc71d3521113628d62d92582a41b5b3e662db4a093cc6b9b2e78b92a96f

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