Malicious PDF — malware analysis report

Static analysis result for SHA-256 2879a093bcf1cf23…

MALICIOUS

PDF

74.9 KB Created: 2021-06-05 16:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aaa299606c2b1342e592e613cc7985a SHA-1: ed126ba27857414f9280fc76c0aa97345a6294da SHA-256: 2879a093bcf1cf2356b8bff1cbb0cd48ec3ad7947d9caa02bb4a2a6f29b31849
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm or phishing attempt. The primary malicious activity observed is the embedding of numerous URLs, likely intended to redirect users to malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/pbw?utm_term=are+mower+deck+belts+universal
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/9112ea636d5f9.pdf
    • https://zorutamazu.weebly.com/uploads/1/3/4/0/134096431/polilutugitu-guwobawimen.pdf
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/3368924.pdf
    • https://pigakuri.weebly.com/uploads/1/3/4/6/134684466/1464373.pdf
    • https://cdn-cms.f-static.net/uploads/4478716/normal_6061ea5bc4561.pdf
    • https://cdn-cms.f-static.net/uploads/4374002/normal_603bd823696f4.pdf
    • https://mogefitinovodug.weebly.com/uploads/1/3/0/9/130969954/318648.pdf
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/8147661.pdf
    • https://cdn-cms.f-static.net/uploads/4459641/normal_602edd10c5677.pdf
    • https://gemebavusoduwi.weebly.com/uploads/1/3/4/7/134746442/pinunowimarod-nixejonavim-kafowujuj-didodixixusuji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sozakuvepar.pbworks.com/w/file/fetch/144518160/what_is_the_story_all_about_keesh.pdf
    • https://uploads.strikinglycdn.com/files/10a684f6-897a-4e3e-88c9-c21aa21ad238/79258486243.pdf
    • http://funinupun.pbworks.com/f/xugukewidinu.pdf
    • https://uploads.strikinglycdn.com/files/b6247a7f-bd6b-4b0c-ae1c-5ea8a54aa6ec/63253428381.pdf
    • https://uploads.strikinglycdn.com/files/8a93df1e-ee78-4fbc-8d5f-9a2c725e3653/pabakoli.pdf
    • http://lomubel.pbworks.com/w/file/fetch/144573444/how_to_install_acorn_120_stairlift.pdf
    • https://uploads.strikinglycdn.com/files/d340115d-1191-4b53-b139-faafcc1404db/o_que__titulo_executivo.pdf
    • https://uploads.strikinglycdn.com/files/cff9fcef-9210-4ecd-ad95-06e13451aca8/90884146779.pdf
    • https://uploads.strikinglycdn.com/files/1c089ccc-028f-4540-9add-37c5395ff8e3/what_can_you_conclude_about_marbury_v._madison_1803.pdf
    • http://zezimin.pbworks.com/f/tasotozofagetovim.pdf
    • https://uploads.strikinglycdn.com/files/b8928ae4-3dc3-411c-a5d4-b1bb205d1cb0/6_types_of_socratic_questions.pdf
    • http://jowenoxo.pbworks.com/w/file/fetch/144550653/stochastic_indicator_trading_strategy.pdf
    • https://uploads.strikinglycdn.com/files/dc79b193-feb3-440b-8462-39c7d70e9c15/clinical_data_management_jobs_in_coimbatore.pdf
    • https://uploads.strikinglycdn.com/files/e965126c-f54e-41b5-ab78-dfcce8e54937/cannery_row_hotels_monterey_california.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e721.bin
b414c0296e6af47cc22d12274283f2a14bf178eb89cafae05f76df8bac3159be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 5428 bytes
font_01_sfnt_off0000f998.bin
f44dc6c805050c56bbdbdb5685c27132c892cc9e824403ceb7b020f6366131af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 10780 bytes

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