Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38212da3fb5b27d…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 20:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aad4aba78f5594257fbd08195f54c8f0 SHA-1: 5bacdd7132931b8b07d9e94de896a20c8d2a40f6 SHA-256: d38212da3fb5b27da89a35914088a3a28ac4b969fecb1253941fb88691213564
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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.
  • 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://druttle.ru/strik?utm_term=how+to+map+a+walk+on+map+my+walk PDF link annotation
    • http://tiwimifozukimu.medianewsonline.com/vamuxopepuruwogutu.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/feserov-jisafu-nufarina.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/nojavavadezinafenulo.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/53376693208.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/zimunizizusu.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/14687943217.pdfIn PDF document text
    • https://kotemuzever.weebly.com/uploads/1/3/4/8/134884044/xunodujonabaniduje.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/am_child_of_god_song_download.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/loxepefow.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/63122296ee.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/polytheism_vs_monotheism.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/gurifedonowuwufazi.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/b5f89109-6a37-45eb-8fec-a3d0499864f8/puxuwok.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/packed_absorption_column_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff427d4-d4f7-4eed-a8a8-79e93dd7e109/52714905870.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/59629310215.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/pufoterexopelamijizete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8da060a-ffc4-4e82-bfc2-f69177277774/sir_gawain_and_the_green_knight_summary_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e793291-7554-46ad-94fc-8f866b9347ed/56710847033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480638b3-8629-4032-bccc-04da0a24000f/tulajixo.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/gamov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6c7cf7-b87d-4177-b8a5-22b8f9e406b1/best_mechanical_engineering_books_list.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/54805500226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f59f877-a5e7-4d6d-b7f5-d253d972a944/hp_officejet_pro_8500a_plus_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6a6c7a-6431-47d5-8cb5-e648799c9ff7/cub_cadet_lt1045_engine_problems.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 4908 bytes
SHA-256: 688e3a15e28726be4d07d265f72f987ce526b668be8f1fe55fc4f127147e012d
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 10808 bytes
SHA-256: e03f245072a7e11fbda26b34eb96aef3a91025bb89894c99ce17f219c315b1c7