Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe56c65da5ad444…

MALICIOUS

PDF

67.4 KB Created: 2021-03-06 12:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: becac35858cfd1221ed78e0e1f5a23f2 SHA-1: 561c1f1224622ced35ff8a8ecefa53d2c629b4f9 SHA-256: 0fe56c65da5ad4449d41fbd366704438fb238585f170c2c796fa01703fc525e5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. ClamAV and ML classifiers identified the PDF as malicious, specifically a phishing or trojan variant. The presence of embedded URLs and the structure suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=bosch+dishwasher+junction+box+rona PDF link annotation
    • https://cdn.sqhk.co/rowemarul/jsxCB0q/oscar_fish_tank_mates.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/security_analysis_summary.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/how_to_open_bostitch_model_t5_staple_gun.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/jgsXPig/star_wars_jedi_challenges_lenovo_price.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/QihqHox/mobile_empire_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/gjfLZ4j/77022641985.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/what_is_cvo_curriculum_vitae_in_tabular_form.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/54225311480.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/xelojiba.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/jijfibX/adobe_photoshop_sketch_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/aiean9Z/febudub.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/lvjgibP/vitaberomewix.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/6XVjfXk/best_craft_beers_australia_2020.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/the_merry_adventures_of_robin_hood_chapter_4_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_18f80d58b56446c0b25d5f037bc23116.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22aec3bd-8010-461a-98d1-6c3b794068e8/how_do_i_adjust_the_speed_on_my_kitchenaid_mixer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081bd32f-aec0-4f90-ac23-7d833b2a748f/tamax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a6ae8e-ebe5-4a44-b2ba-b3f64d217ed8/bosidasovolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376f6b25-9b50-4eaa-bc9c-5ad24409688f/netupolalutozowipazov.pdfIn PDF document text
    • http://xarejaxeb.rf.gd/vivodurejodarugonar.pdfIn PDF document text
    • http://wawavubuwile.rf.gd/asanas_pranayama_mudra_bandha.pdfIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_f6cb794840b94579935d3c9f04e14fef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/852595e5-ae25-4f11-bf0d-3ea4ef63aedc/ford_5000_tractor_repair_manual_free_download.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_off0000c922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC922 5420 bytes
SHA-256: 7398047e0c99f3ad33a9f75d6b18f3ab7bdd8fc97f52601ec40cff2bdb94c254
font_01_sfnt_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 10756 bytes
SHA-256: 1f1cf925525ea6c1ba4fb3c4ade27eae18f16862b60c2c206c2dbba02b7312ef