Malicious PDF — malware analysis report

Static analysis result for SHA-256 697aaa69bfd06aa5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-14 14:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c42bb89887aca950d5ad016c33d51694 SHA-1: 9e2ca33e5b9ae6de1772dac7a82071d14bf40e92 SHA-256: 697aaa69bfd06aa51658f67af79fc3c19c40985c375608199c120c57561b089f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a suspicious domain ('jottigo.ru') and another to a link farm hosted on disposable domains. This suggests the document is designed to redirect users to potentially malicious websites for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=how+to+clean+homedics+warm+and+cool+mist+ultrasonic+humidifier PDF link annotation
    • http://bodaweziwov.mypressonline.com/81467646553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_6047c8b3e4b2f.pdfIn PDF document text
    • http://sarhello.online/aesthetic_gacha_life_backgrounds_for_edits735z8.pdfIn PDF document text
    • http://leomannapov.com/98919750770rpsyb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_60413ba847279.pdfIn PDF document text
    • http://lifegirls.site/jaybird_x4_red_light_wont_turn_offrrf9i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413702/normal_5fdb5e0f3db29.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/how_to_learn_web_development_on_your_own.pdfIn PDF document text
    • http://mamontov-net.cc/apology_letter_to_boss_templatep26zj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5fd90e5248be3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dupula/12453849999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41d011a-87b1-4371-92a8-2a51d03c145c/10669751111.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_275591f48ffe41329eb512a8eeed74e4.pdf?index=trueIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_e60d154940d14466b77f76ea9e4080c5.pdf?index=trueIn PDF document text
    • https://bbfcab69-cab0-43b8-b861-839d52945da6.filesusr.com/ugd/fa71eb_33637067f7624d2ba57e673c4954ae8d.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_19da0dcf136247abb737e466b36ccf5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/xexonasixevogelelederoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ea61ca-e7e8-4e98-bce9-e5fabe09d3b4/lidawediwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57708849-b9a0-49e2-aa63-0a98bbfabf8f/mobiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3398282-b30a-4436-9e9e-676b16138cc9/is_there_an_arabic_alphabet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 5196 bytes
SHA-256: c3ab7d8468faca6ddc73c429dafc76ed3695215df41c3f35d002d577ed83cd80
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10896 bytes
SHA-256: 1d7bd92a94746730aa56362757b7c3ff60cd6b1408b3e8e5fa1d54a384b8c075
font_02_sfnt_off00011a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A96 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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