Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0087c4d79608bd…

MALICIOUS

PDF

70.0 KB Created: 2020-11-21 03:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 572def81f3a6c1f2c202e7a96f5bb29c SHA-1: 1c605ef5d4f5d90e9c1504c3f9a5c56c0771f629 SHA-256: dd0087c4d79608bdc6188a46d56dd61ccb2e15d728f2de341115ab3569727898
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. One of the primary URLs identified is 'https://traffnew.ru/123?utm_term=ma+dcr+dam+safety', which likely serves as a lure to a malicious site. The document body is heavily obfuscated, but the presence of PDF_SEO_LINK_FARM heuristic indicates a mass of external links were embedded.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffnew.ru/123?utm_term=ma+dcr+dam+safety PDF link annotation
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9373972.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/3636387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f8ffd216ae9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f89a541b3d92.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/9c9d9788-2b81-459b-94c9-030398897c05/55923648728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a538be-b647-4b5d-930a-a2cfc451b491/42984894883.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/93870744386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd6e121-45d8-4851-980f-1ed57bf54b7a/18469285133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e57da60-db82-4163-a998-9b993149c0b2/lelubevevugavupagozidis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5d95c0-ad8e-4ff4-9351-c9674101cd00/bafegarusojixovetadafukox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b4fe6e-5b65-4b59-919f-ab0c657df318/sniper_assassin_5_level_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/2578680766.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/getting_lumberjack_outfit_fast_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe56e3e-b760-4121-b49b-f6435173abe5/fourth_genre_submissions.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/39010553344.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/biliwipujijegorejifax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ff7a00-394e-4ae3-98fd-e29820f65483/wefam.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_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 5244 bytes
SHA-256: 9d03b156c393bc952644ba15a9cc421296c6813b857db8bb1c429ed11d92b582
font_01_sfnt_off0000e711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE711 10464 bytes
SHA-256: cebd52220c5bc91324b9b54fbfe83e70954777e7fce9aaeb15200625703e188d

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