Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce595c11c985d58…

MALICIOUS

PDF

80.7 KB Created: 2021-04-04 14:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f251a7fd744f236fc47f1e75dfbf270 SHA-1: 507123bd53948b0749764607a0061656a57f48b6 SHA-256: 8ce595c11c985d5888a25ce0a6b44b97c86c54d890a7cc0488d4a8dcfb154728
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, characteristic of a link farm, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to downloading technical documentation, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=asme+section+viii+div+2+pdf+free+download
    • http://gitilapen.66ghz.com/bhangra_bollywood_songs.pdf
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/4244319.pdf
    • https://vatikaleme.weebly.com/uploads/1/3/5/3/135386674/zogezakenek_xazaj.pdf
    • https://farunekigevizaj.weebly.com/uploads/1/3/5/9/135976182/7392952.pdf
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/tukixirubumo_larosakimo.pdf
    • http://sipoxamux.22web.org/70131259127.pdf
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/ea93d28cb7dcbf1.pdf
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/2992670.pdf
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/8334a.pdf
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/wepanatevezoli-tapekafofijim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://maretazijedoval.epizy.com/rejuboz.pdf
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_47b126123ad240b8a595c7c4e171e1dc.pdf?index=true
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_833b77b932b24c108dca23fde23a78ba.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_8d1930371e0f42f1bceb7016a442f8a6.pdf?index=true
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_bf762eaad7d2424188e8c3eeb8c1cde3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b5bce00-5b84-43aa-b922-7974c56ba437/ubuntu_mate_raspberry_pi_4_32_or_64_bit.pdf
    • https://uploads.strikinglycdn.com/files/24af5836-fd21-4165-b3c6-4b733b5a1776/jejumenusizixozoz.pdf
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_6cef5354f0c444bc904c7e58453196cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ab59be2c-ead5-4dfa-a9c7-2cc8196e5e6f/somewhere_over_the_rainbow_iz_chords_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/39382ba7-3884-499b-980f-20de5c02ffed/customer_service_job_summary_sample_resume.pdf
    • http://bajobakokela.epizy.com/aarya_malayalam_movie_ringtone.pdf
    • https://uploads.strikinglycdn.com/files/aff7410d-3d0b-4bfd-962a-878664c382dd/forma_de_gobierno_de_espaa_monarquia_parlamentaria.pdf
    • https://uploads.strikinglycdn.com/files/f2c17fba-b156-44ab-a6e6-b20ecb46fdee/2019_10th_international_conference_on_power_electronics_and_ecce_asia_icpe_2019_-_ecce_asia.pdf
    • https://uploads.strikinglycdn.com/files/d69375bd-cf49-4f44-ae58-3f1a07697296/wujane.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_off0000fccd.bin
c459072667c8de4f6673b8acabec40e7a19f3c1dc3bb42156ffe80df62a2f3d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 5576 bytes
font_01_sfnt_off00010fce.bin
84e6afb91b8032b2b46190d0d238babcff867610700a2b406dfc3d6343b19c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 10916 bytes

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