Malicious PDF — malware analysis report

Static analysis result for SHA-256 75db8f30e79f70d8…

MALICIOUS

PDF

79.1 KB Created: 2021-03-04 20:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a269a0773f59feaf0d2f1914702c2864 SHA-1: de0e24eeaaa7452dfd7c769aaeaeb13054fb0cc5 SHA-256: 75db8f30e79f70d8f88a8b2cc04bb90c0f37d4d01c1d8394045d79430b19e6ae
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains numerous external URIs. One prominent URI, 'https://dugedepap.ru/strik?utm_term=keurig+single+cup+coffee+maker+instruction+manual', suggests a phishing attempt disguised as a Keurig manual. The PDF structure also indicates it's part of a link farm on disposable hosting, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=keurig+single+cup+coffee+maker+instruction+manual PDF link annotation
    • http://tezosomebapixim.22web.org/79154554376.pdfIn PDF document text
    • http://menesoger.iblogger.org/fumujododa.pdfIn PDF document text
    • http://kitufavurakural.iblogger.org/sports_name_list_with_pictures.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/13922739251.pdfIn PDF document text
    • http://sikagez.22web.org/pukas.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/skyrim_glitch_word_of_power.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/bimumuvotodujidir.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/436b81e0-e789-4de2-9131-7e5d2f1f8b3f/voroxusejokox.pdfIn PDF document text
    • http://jenefidozepojig.epizy.com/80137178760.pdfIn PDF document text
    • http://likabagumaza.rf.gd/forecast_worksheet_in_excel.pdfIn PDF document text
    • http://xegukamadoso.epizy.com/votepabuxusiwomosiwes.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/15893313514.pdfIn PDF document text
    • http://popirarubinuluk.rf.gd/sinhala_lassana_adara_wadan.pdfIn PDF document text
    • http://situwosase.myartsonline.com/how_to_set_garage_door_opener_in_bmw_328i.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4b87d7-65b9-4629-909e-25f2415b5528/chibi_maruko_chan_sticker_whatsapp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c702874-5822-432c-9816-36916d4c292e/sowakogagotid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e500b0af-8df7-44a7-8227-924151e0b33e/japatosajuruvota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4ec8db-e35b-4ebc-b67d-0becd5026fa9/pencil_portrait_drawing_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a31672-c3a2-4404-bac1-112453a06c14/sezosilebigowadesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d29dc9-b92c-440f-92c7-6ef7ea2699d3/surface_area_and_volume_of_cube_and_cuboid_wikipedia.pdfIn PDF document text
    • http://jasosuwer.epizy.com/back_to_school_supply_drive_flyer_template.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/garuxodo.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_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 5368 bytes
SHA-256: 8ea1bf28d6b25cb561f0e745635194571eb80947d650291a1d6506ec6ed0621e
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 10712 bytes
SHA-256: dde3a588738ad3b11f1a4079009dbc92f5908344f4644991647d86e19faa5b47

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