Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31df18765c65d55…

MALICIOUS

PDF

81.5 KB Created: 2021-02-28 00:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a46fcc8aceba68595582cdf2c4cf0f3c SHA-1: bb21ad4ee8b1e57b795a0a623ee3d96571727e23 SHA-256: a31df18765c65d55f9562924777d79b73ae3c2850e4b0fd87313b31c60026a80
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 0.9996

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=toyota+camry+le+2012+review PDF link annotation
    • http://nebemor.mywebcommunity.org/91184647570.pdfIn PDF document text
    • http://mobile-media.moscow/nfl_injury_report_saints6dh3j.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/8350336.pdfIn PDF document text
    • https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/7814181.pdfIn PDF document text
    • http://ganirutejiz.iblogger.org/21584206777.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/rama_judicial_consulta_de_antecedentes_por_cedula.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/e58757b3c.pdfIn PDF document text
    • http://topmassage.net/when_it_changed_summaryxy4vp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5ffe0013450ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_601ee513b485f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_601e9362b6828.pdfIn PDF document text
    • https://kikuwigew.weebly.com/uploads/1/3/1/4/131407235/c22112.pdfIn PDF document text
    • http://hookup154.online/alvanon_dress_form23kdz.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
    • http://begupegag.epizy.com/47104545251.pdfIn PDF document text
    • http://jenofabejuvokag.epizy.com/black_lightning_season_2_episode_11.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/jaundice_in_newborn.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/easy_ratio_math_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/traffic_report_glen_burnie_md.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/amaryllidaceae_family_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/cinema_hd_v2_android_apk.pdfIn PDF document text
    • http://puwogufipuja.epizy.com/vowatovan.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 4980 bytes
SHA-256: b95ccce80a1bd7d941a7984846269456134d3aa24adba7ebf6c6ab5c0cd94b11
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10512 bytes
SHA-256: 679bc873d142a40e1d156e6061cdb082aee1da60f6d6bbdc76b89d6839664f91
font_02_sfnt_off00012a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A00 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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