Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5712157f5b4c64e…

MALICIOUS

PDF

72.1 KB Created: 2021-06-08 21:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6b5d4739e736268bfb7217d9dd944d5 SHA-1: 1a39793bde7cebf6de50e8b170bc3d00f466c707 SHA-256: b5712157f5b4c64e874fb9d612718042e6e4e250f1310ab0b2ee0edc399bb8ee
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 0.9995

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://catamma.ru/pbw?utm_term=free+video+chat+video PDF link annotation
    • https://futemagavixen.weebly.com/uploads/1/3/7/5/137501346/7379947.pdfIn PDF document text
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/vidoro-pivurogaxesok-lurumor-sitojakej.pdfIn PDF document text
    • https://datikuzos.weebly.com/uploads/1/3/4/6/134698269/8190934.pdfIn PDF document text
    • https://tazififodokufu.weebly.com/uploads/1/3/0/7/130776891/dabobelupu-givobivobune.pdfIn PDF document text
    • https://vagajexaxe.weebly.com/uploads/1/3/4/3/134359414/bef914656d021e.pdfIn PDF document text
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/7453828.pdfIn PDF document text
    • https://tanipodolotuweb.weebly.com/uploads/1/3/4/4/134457000/timobofiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144421068/kivenabasepevuvobalex.pdfIn PDF document text
    • http://sejiliki.pbworks.com/w/file/fetch/144553701/mutekebimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae64b400-95e0-410c-a376-d75ed8e8ccf0/gemini_home_alarm_system_manual.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144740676/reliance_manual_transfer_switch_wiring_diagram.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/w/file/fetch/144659502/pixie_lott_hair_dye_instructions.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/86439733556.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/w/file/fetch/144813003/oz_the_great_and_powerful_movie_in_hindi_download_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39de168c-19c1-49e4-b564-744dff045bd3/jawbone_mini_jambox_bluetooth_speaker.pdfIn PDF document text
    • http://lalakabazu.pbworks.com/w/file/fetch/144677091/nonton_avatar_the_legend_of_aang_sub_indo_episode_7.pdfIn PDF document text
    • http://ronefete.pbworks.com/f/81667420652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6677e7-6804-4a17-ac28-bd463a6f6c5b/60411701599.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144437898/51287879599.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/w/file/fetch/144648978/what_is_rule_of_72_formula.pdfIn PDF document text
    • http://dagomiwavi.pbworks.com/f/lidavamak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17194b4-eace-4d8c-8f71-d4a46ff616fe/definition_of_mitotic_spindle_in_biology.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_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 4832 bytes
SHA-256: d2eda2bfb16ef73d985793de9ee6227ed480924f991295e6d2d9b7483b378de4
font_01_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 10428 bytes
SHA-256: 99ff9d5aadb862118f5e746bb48b55dcb90d788920beef474a36235f34d780b3

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