Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fbb25aa41619e3…

MALICIOUS

PDF

75.6 KB Created: 2021-03-22 23:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0169aba8a7a9767613e30d62a950ab22 SHA-1: 4bf0d3f65da031afce7a33b5bf1cb0f812be6f96 SHA-256: 29fbb25aa41619e38366b013950c068016abd4430c37c4abd7f8141ff4d1728b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a 'strik' endpoint on 'botokaw.ru'. The document body, though heavily obfuscated, appears to reference product information, suggesting a lure for phishing or malware delivery. The presence of external URIs and link farm characteristics strongly suggests the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=rii+mini+wireless+keyboard+with+touchpad+price+in+pakistan PDF link annotation
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/lewoxe.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/pugebumopoxiwozakope.pdfIn PDF document text
    • https://mifajuga.weebly.com/uploads/1/3/4/7/134732675/moramek_xofutababafawan_zosofugir_zapuxobezugepod.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/pisazojebuxudolimiro.pdfIn PDF document text
    • https://lipodemofuxe.weebly.com/uploads/1/3/5/3/135316225/jobabojoduvik.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/biologi_sma_kelas_12.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/how_to_do_silver_glitter_eye_makeup.pdfIn PDF document text
    • https://pejudipevunasu.weebly.com/uploads/1/3/5/3/135351173/b1aeababa1b489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_60246443d6352.pdfIn PDF document text
    • http://zedateve.mypressonline.com/47806258028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489264/normal_5fdc6d51e59ab.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/871344ca-49c6-4b20-a7ee-716f0ebca6ec/factoring_trinomials_a_1_lesson_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/ruwokipip.pdfIn PDF document text
    • http://nitubak.atwebpages.com/manual_do_guerrilheiro_carlos_marighella.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/radical_self_forgiveness_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/how_to_know_if_a_shape_will_tessellate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d65dfa-b077-43dd-9fdf-cdbe0114f266/brother_mfc_7340_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/reporting_taxable_income_to_centrelink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3bbcd9-20ce-46a4-9283-3159e12d5020/why_does_my_hot_tub_keep_saying_e02.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a49630-2fea-40ea-87c2-25a9b6aead08/73652897910.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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 5716 bytes
SHA-256: 888d11e9a3f49ff2fa169c6f940cee1c968a2a9b4f4a2614c213096c985ce9c1
font_01_sfnt_off0000fb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1C 10824 bytes
SHA-256: 981cb17e7ce3d50e737e25a24dcd0a0b7fc453881aeb3f4aa09410d61f52a325

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