Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1306a37b0a233a…

MALICIOUS

PDF

79.6 KB Created: 2021-04-07 11:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 019d1382c1b32b1a3eafc96decd113f1 SHA-1: 295806afec5e1d278435d8e94c5251837a0efa28 SHA-256: 0e1306a37b0a233a28df45ab7f4bc57a47a0a89b47163b5e0744f2acf2fe0ed1
186 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified a significant number of external links, many hosted on disposable domains, characteristic of a link farm or phishing lure. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content.

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://mezovuduw.ru/strik?utm_term=boss+dr-3+footswitch PDF link annotation
    • http://jisetatiloro.scienceontheweb.net/46666889594.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/56648515680.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/7KhjbN7/war_with_grandpa_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/eJKjjj5/biguwirulize.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/kokulodedobek.pdfIn PDF document text
    • https://cdn.sqhk.co/tulazofava/Zjdghgd/bible_in_basic_english_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/fawgjOh/vuzovut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_c8ab51696cb0409e851c9e1c2bdce330.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_a5a2fc5beb0842c1863bb9e622b0d8bc.pdf?index=trueIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_29a4cc6769e2449396b752ca37eda2a9.pdf?index=trueIn PDF document text
    • http://mufomasugom.epizy.com/62065487787.pdfIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_ae722c78061143bd900554e93a3eb8d7.pdf?index=trueIn PDF document text
    • http://totefopige.atwebpages.com/57171514537.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_5b2bf02ec5d9474aaf641f9d4e5af3dd.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_7a1d13b6fff649c7bf66dbb1b374fdfd.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_c633001d0ccc4b298cc434fcae464452.pdf?index=trueIn PDF document text
    • http://luwawabegopit.rf.gd/xesadege.pdfIn PDF document text
    • http://lidudoxodirabi.rf.gd/veweniziwulero.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a118472c99c74f0080d3edc094c97e43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54eefe5d-576d-4093-b378-750a835336a3/viwuwuwigizibufuwexeguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1767db4-92cb-48c3-ac7f-dda79f2419b4/mtd_lawn_mower_oil.pdfIn PDF document text
    • http://gexovegamone.rf.gd/sol._du._ac._in_2018_date_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0eea9b-9bb2-4f9e-aa4b-33aafc6efbd7/how_to_become_a_storyboard_artist_for_cartoon_network.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_c6b8fea03cdc4ec8add5302519c4b749.pdf?index=trueIn 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_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 5204 bytes
SHA-256: 511e80982b5684e11c25952828f23376b605bdfd3843992535bb55ea5af1604c
font_01_sfnt_off00010ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA1 11312 bytes
SHA-256: 3fd8da12b82d22908eb64db4c3be17823560510d52ec5c821445b367483bd698

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