Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da447e7bc7fe262…

MALICIOUS

PDF

73.8 KB Created: 2021-03-23 15:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22458a0b2bd47bcad97a0e8fd80832a5 SHA-1: 9256fe58909dddb8132ce95c406cdddc2aa21a33 SHA-256: 9da447e7bc7fe26251818ff87633e0bedec51fff7cb64659df3935be705d49ab
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=genie+garage+door+troubleshooting+screw+drive PDF link annotation
    • https://dodarumobite.weebly.com/uploads/1/3/1/4/131437296/4351244.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/fopedenaganidusu.pdfIn PDF document text
    • https://xaripapaxogazix.weebly.com/uploads/1/3/1/4/131437161/tapojajegalulus.pdfIn PDF document text
    • https://tikivumisa.weebly.com/uploads/1/3/5/3/135346314/mimapifixu.pdfIn PDF document text
    • http://stixlife.info/season_6_grey_s_anatomy_episode_guidev93pt.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/jJifhjb/vonotipanorawa.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/enz0hjW/rocket_launch_tonight_countdown.pdfIn PDF document text
    • http://proita.fun/bunudivitajinawukmq9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_23db7078446c4af8b323b87058c2abaf.pdf?index=trueIn PDF document text
    • http://disoluje.myartsonline.com/black_butterfly_wattpad_download.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_aa192043b27b45d29055056e232e0ac0.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_bf6b5db90426443f9c3582829c983de6.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_4f168727d8c54b4a821af2dcc20d9260.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_6b1b7214c8004aa7b2751ecb689347d8.pdf?index=trueIn PDF document text
    • http://rowoniwetob.atwebpages.com/77105418704.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_2f3d18a857a045a3bd57536177bd8255.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_off0000e1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 5524 bytes
SHA-256: 1f202460f6db9e9948da6d660fff5ce75222ef834d4d5d1083451fa0c4f08a84
font_01_sfnt_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 11048 bytes
SHA-256: 42c32c33072c19e3d1680058ada50eda840e08616f518c50f9c41bebc4ff9e70

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