Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d5bbf48e9491d5…

MALICIOUS

PDF

73.4 KB Created: 2021-03-26 05:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81bc8949b0057a4e9c90cb1cec3471db SHA-1: e33a444bc959707ab7051cb9e56bb826c99d0b6d SHA-256: 80d5bbf48e9491d57d0cd3aa0ccf4d0695244d40fc8bb0adf1d9fcf0b6d692bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one prominent link pointing to a suspicious domain 'botokaw.ru'. ClamAV and ML heuristics also flagged the PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=demon+spirit+seed+novel
    • http://tonedomopoja.scienceontheweb.net/33744986183.pdf
    • http://viwavidif.getenjoyment.net/texas_instruments_ba_ii_plus_online.pdf
    • http://nugawijuxuv.mywebcommunity.org/henri_cartier_bresson_the_decisive_moment_download.pdf
    • https://vadanidubaseb.weebly.com/uploads/1/3/6/0/136089859/5a78f12a3042a.pdf
    • https://rogaturo.weebly.com/uploads/1/3/1/0/131069781/6751560.pdf
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/8559506.pdf
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/6ac372ad770398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tiluwisulepam/wudewoselukis.pdf
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_ff7adfa711bc45fd8fc23d593f29b016.pdf?index=true
    • https://s3.amazonaws.com/veledabejufi/the_last_of_us_ii_trailer_song.pdf
    • https://s3.amazonaws.com/tixeligufokup/late_payment_terms_and_conditions_template.pdf
    • https://s3.amazonaws.com/jutenojamega/defenseless_corinne_michaels_epub.pdf
    • https://uploads.strikinglycdn.com/files/52ff315a-e0e1-4063-a8a1-23d8c38f02f0/how_to_measure_a_washer_and_dryer.pdf
    • https://uploads.strikinglycdn.com/files/1abb0a13-0d78-4f17-8edb-bb7eb0c5f81e/wahl_lithium_ion_trimmer_reviews.pdf
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_0afcad17ec194766817274c45a81fd8d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bd258bf4-f495-4242-b3e1-08e739944eb6/minn_kota_power_drive_v1_foot_pedal_wiring_diagram.pdf
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_d26a0290f75c460593a8802d5222cf07.pdf?index=true
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_5ec95da459ca4f81a9534dea66ac6028.pdf?index=true
    • https://s3.amazonaws.com/takebemanijewok/nexamudoridefavegepa.pdf
    • https://uploads.strikinglycdn.com/files/766e0e31-e7e2-44a6-9eb5-e8209239cbe7/42514728457.pdf
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_6ce9e7d799274d6d9447ff0cac80585d.pdf?index=true
    • http://pekafujojef.onlinewebshop.net/78367975201.pdf
    • https://s3.amazonaws.com/rurovikejigibu/becoming_supernatural_joe_dispenza_espaol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc19.bin
8b5cda1b2cc2695db5f5b058820088c5e2fc02c8530f726f139cd89100586fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 4512 bytes
font_01_sfnt_off0000dbc6.bin
1dec48da555aa2b36db37bf8f8f7a279e0a9f6e9d4904771da82c447e5135c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 4952 bytes
font_02_sfnt_off0000ec98.bin
2b4d0180fdbada4c69d26449f0540b31710c756b81e27cffb63c49323e78dbec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 13552 bytes

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