Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ab8cca4b67d427…

MALICIOUS

PDF

70.3 KB Created: 2021-03-31 10:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47df1420a75270c3987039466fb4c6d4 SHA-1: d6de3979777db1eb021d3c5dc92f1cc68eda5791 SHA-256: 41ab8cca4b67d4274ef08f0437f03212ba10c10dcae70cce1890563e259f2087
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=lexus+es+350+f+sport+leasehackr PDF link annotation
    • http://prizinsta365.online/3ds_error_code_003_1099v6x8d.pdfIn PDF document text
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/9893573.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/TYKvha1/zamonepenimerowujoxewaz.pdfIn PDF document text
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/sifuve.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/vowibaj-pamuje-durodumu-gexodatot.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/jihiidU/novip.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/84cc3fcdf9.pdfIn PDF document text
    • https://tazesudi.weebly.com/uploads/1/3/0/9/130969012/fbb08b1792e1.pdfIn PDF document text
    • https://sisuveraxom.weebly.com/uploads/1/3/2/7/132740665/nawijumokogiren-ferawejakovo-pogususatebajiv.pdfIn PDF document text
    • http://shopsupergood.site/big_little_lies_male_cast_season_2_watch_onlinelubev.pdfIn PDF document text
    • http://afracheat8.xyz/26876498823eejjp.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/09a34811-6280-4aec-8789-093cd61ba9d7/el_arte_de_la_seduccion_robert_greene_libro_completo.pdfIn PDF document text
    • http://merilejefug.rf.gd/analitica_web_2._0.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/wumedidisozizibojepuwujel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bd8c31-f225-4037-95b5-8ce9470a678b/how_to_calculate_inspiratory_flow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23135f00-f664-4fb3-ac39-e136fea182ea/how_do_i_order_a_jitterbug_phone.pdfIn PDF document text
    • http://rivebop.epizy.com/3875483943.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/anaconda_video_songs_ing_telugu.pdfIn PDF document text
    • http://gataluxogawix.epizy.com/83583817395.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_off0000d101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD101 5604 bytes
SHA-256: d03d1b7eac2378ea74a2f46eee8d6c79574d77051ceaf112fa1bf31579d58c57
font_01_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 11760 bytes
SHA-256: 6819f263f8dceb7d116e50ce0e09a10fb9e45a3f84a2d3de7bcf916455a87a4a

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