Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af4f235c97254c6…

MALICIOUS

PDF

82.0 KB Created: 2021-03-13 16:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 42988307aeb9fd42dab607d46b908435 SHA-1: 22ab80c50eb38d1d16b19290dce2259628099cf6 SHA-256: 3af4f235c97254c62bc958e536e122f8c7d67e1856137fd8ec20d3aa6c715816
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDFs hosted on S3 buckets or Weebly, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://leonvi.ru/strik?utm_term=orbit+4+station+timer+manual+pdf', is likely a lure to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • 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://leonvi.ru/strik?utm_term=orbit+4+station+timer+manual+pdf PDF link annotation
    • https://tuwureliw.weebly.com/uploads/1/3/4/1/134108737/fajisuxibumojedasoz.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/fesemifefen.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/lutamebeg.pdfIn PDF document text
    • https://pinukozemaf.weebly.com/uploads/1/3/4/7/134713375/321b1ab0ceb2.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/4676638.pdfIn PDF document text
    • https://ziropiwos.weebly.com/uploads/1/3/4/3/134311351/satobamomevujaxi.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/pigapafidijanar-senud.pdfIn PDF document text
    • http://sirosin.iblogger.org/delivery_simulator_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/gdsieje/sketchbook_draw_and_paint_app_download.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/kijagij-runopofarekud-kijidimutibisul-juxiweruxuton.pdfIn PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/364aeb261d985b.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/yidKWnU/kodiwazezisowuwof.pdfIn PDF document text
    • http://fipoziwebetaz.22web.org/gartner_cybersecurity_report.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizup/79106071492.pdfIn PDF document text
    • http://wedagavuvux.epizy.com/zasuvadiruku.pdfIn PDF document text
    • http://tasobigadegef.epizy.com/synonyms_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/18496612061.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/sujurimilabo.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/posewuxik.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/keerthi_suresh_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/apus_launcher_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/31206981496.pdfIn PDF document text
    • http://fijudixisofuzat.rf.gd/osteoporosis_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/18848114803.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_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 2112 bytes
SHA-256: 2acf5950921f2a0de61bdd1d6a982b246c5ab6c5d47f6f089f44fb61174ca994
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 5444 bytes
SHA-256: 3ab1570f8daf697536fc3df70057f30f19f8c547a1192c9bdbbf35406a6fae6c
font_02_sfnt_off00011412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11412 11488 bytes
SHA-256: 81a18ec6b89f59c0483ba2d5d196adac6c33f4698afbdfa645e41a71e11acce3

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