Malicious PDF — malware analysis report

Static analysis result for SHA-256 51025b5d5d19fbca…

MALICIOUS

PDF

80.4 KB Created: 2021-03-10 01:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0764556a8f1e57855317fd4ee446ff56 SHA-1: bee8f3bc1dce05ab49a6c146bbb9e6cdd700fdc8 SHA-256: 51025b5d5d19fbca39a34c2594f9cdd35a43568dc07f8a0025cc73f9646cef90
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as service manuals or similar documents, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/aws?utm_term=1990+toyota+pickup+service+manual+pdf PDF link annotation
    • http://jobware.pro/lajegupefogogigusejisob4r0f2.pdfIn PDF document text
    • http://fotuxeji.iblogger.org/4849553994.pdfIn PDF document text
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/601731c6d1c9d.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/bamaxem.pdfIn PDF document text
    • http://rat-red.space/ragemazofazajabigaraxanow1rn8.pdfIn PDF document text
    • https://pidedofafotego.weebly.com/uploads/1/3/1/4/131438241/2deb862.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/880fcc910a5.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/tanepimosakixaxive.pdfIn PDF document text
    • http://getiwiviji.22web.org/magic_chef_10.1_cu_ft_refrigerator_reviews.pdfIn PDF document text
    • https://guwasevotimonu.weebly.com/uploads/1/3/2/7/132741081/komofilivimemi.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/xetadugam.pdfIn PDF document text
    • https://falitevegenos.weebly.com/uploads/1/3/4/3/134321562/dilonokeviwejokovi.pdfIn PDF document text
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/kinajoxizowamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posawutuz.rf.gd/how_to_reprogram_clicker_brand_garage_door_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/ziveratudatilowovawokiko.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_b0ba1e96a6604443a257e56fed99a823.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/is_trane_the_best_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/iphone_5_alarm_sound.pdfIn PDF document text
    • http://towuzop.epizy.com/star_trek_voyager_episode_doctor_alpha_quadrant.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/lifetime_network_tv_guide.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_2108773ac26545f89c6c92bd087a1eaf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/98511225909.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/zuzonodeza.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_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 5784 bytes
SHA-256: 45a2e6ae9e3235d24df9d62ca5a476c39dfa400a6bab3b28b34dd67818ddc811
font_01_sfnt_off00010fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 10688 bytes
SHA-256: 10b0c5c34fa54aea67009514740537f0d37340ae9d4221c441164ed8ef9ff024

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