Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e841d5ef3f047ea…

MALICIOUS

PDF

72.2 KB Created: 2021-06-10 05:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 021aba0855c527c682e203088dfec358 SHA-1: 05682f9aea945b83cc3c96d507ca32fee6498ebc SHA-256: 0e841d5ef3f047ea24637a1f4b3f7f2850a424973ade59399da00ca99e1ea350
126 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. It contains an external URI pointing to 'https://pixomot.ru/pbw?utm_term=install+ubuntu+on+laptop+from+usb', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of numerous URLs, many on disposable hosting, indicates a link farm designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=install+ubuntu+on+laptop+from+usb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365567/normal_601490c63098b.pdfIn PDF document text
    • https://fosarujup.weebly.com/uploads/1/3/4/6/134624161/b343f1409cc.pdfIn PDF document text
    • https://jaxizunup.weebly.com/uploads/1/3/4/8/134885867/darojopixemar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_6019fd5875b63.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/wogogesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_6041f39478b15.pdfIn PDF document text
    • https://wipolupenigikof.weebly.com/uploads/1/3/2/7/132712614/b39726271dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_603934db66456.pdfIn PDF document text
    • https://ripumoravoramex.weebly.com/uploads/1/3/1/6/131606135/wajomut-torodajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lulimogosan.pbworks.com/w/file/fetch/144491916/mcq_on_algae_and_fungi.pdfIn PDF document text
    • http://tabemisakem.pbworks.com/f/zimitupunadixenidog.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/suduwopazawizipe.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/tafigilumugonola.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144704775/tuvukubatekuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4503c04c-c13e-44f6-98da-442384bd642a/xixukunepi.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/creepy_nights_at_freddys_1__android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237f5213-a2bd-4ee1-8e0f-190d90a6cdbd/how_much_is_2007_lexus_rx_350_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d638bc21-7bc5-498d-85c1-23a712dd64d7/chopin_-_spring_waltz_mariage_damour_partition_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2c617f-c44a-4a93-8bc0-0f37cba20699/craftsman_skill_saw_guide.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/sezejejazesuxenusuwulax.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144779826/convert_to_autocad.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_off0000dd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 5124 bytes
SHA-256: 69d2b7f8cd5dcc3607c150e80e59da42b26d53d46d618206882652d36802372c
font_01_sfnt_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 11092 bytes
SHA-256: 378ad38e1bd23d95b542f83d46d794c1a37e01228a84f4277b0d79e0a8e0549f

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