Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1cc6ab7c4345f…

MALICIOUS

PDF

71.6 KB Created: 2021-04-03 13:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cbdac74c7ed6e746c6820088679023bd SHA-1: 2060f3028b9e5c00880206813f3bfc608400899c SHA-256: 0fb1cc6ab7c4345f393ad88a0d3e91876ef97d243a371a54a967891adc757968
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it functions as a link farm to direct users to potentially malicious websites. The presence of embedded URLs and the overall structure point towards a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=speak+softly+love+violin+pdf PDF link annotation
    • https://cdn.sqhk.co/tixuniwe/dhcjchh/50106640271.pdfIn PDF document text
    • https://cdn.sqhk.co/jobezivozuf/UTitjgB/amazon_fire_tv_stick_3rd_generation_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/jjihJja/cartoon_wallpaper_4k_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/jc2ighH/25333463964.pdfIn PDF document text
    • https://cdn.sqhk.co/bogonelemid/ahcjage/flight_pilot_simulator_3d_game.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/advantages_and_disadvantages_of_internet_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_06401b0b86554c318516a9124293ba0d.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_adc424b7451d493e9512fb4f05cb5139.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_56dc2971bd3b46489544de94541513f0.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_6777ad30ef524a40b6ea717dd10aa142.pdf?index=trueIn PDF document text
    • http://vepibali.rf.gd/kewujevebaziburasavogelex.pdfIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_861a998da54c47c8bedf3197918a5909.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_de951fc965344801bb237d4f1c5cf983.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_fe885d958b134476b5bd0f87ca088271.pdf?index=trueIn PDF document text
    • http://relivoziz.atwebpages.com/composition_of_soil_organic_matter.pdfIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_5d153beae62842d882c4e032edc6b56d.pdf?index=trueIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_196813d82aa74f9591f3bace78c05a93.pdf?index=trueIn PDF document text
    • http://gokatajikimole.rf.gd/angular_5_tutorial_franais.pdfIn PDF document text
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_dcd4fbc1f9554aefbcddad7a642caac5.pdf?index=trueIn PDF document text
    • http://titugol.atwebpages.com/sunbeam_water_cooler_ylr2-5-90hz3_manual.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_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 5268 bytes
SHA-256: 134a46ab41ef87290a8e3acd3548ca63185037ffa2c2251d24445b25c3a9bb97
font_01_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 11524 bytes
SHA-256: 01dce61452ea78833925afff08ee2d8116e8a960f00593dfe925fbc12fb60707