Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf06acc1129cbc37…

MALICIOUS

PDF

77.2 KB Created: 2021-01-08 14:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b32e6d4fb68eb4561bf603e81188e4f6 SHA-1: bb3a65ef40d23c039c68bf8eb9d7bd1698460bb3 SHA-256: bf06acc1129cbc37d8250f92da51ecbc69615b347e4936223c0c1ab992f751f9
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The file contains a large number of external links, many of which are dynamically generated, suggesting a link farm or phishing attempt. One of the primary external URIs points to a suspicious domain, likely intended to host malicious content or redirect users to a phishing site.

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://trafficel.ru/aws?utm_term=bloomberg+new+energy+outlook+2015+pdf PDF link annotation
    • https://cdn.sqhk.co/sazalevimit/iaVsjgh/cartoon_wallpaper_hd_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/Bhbfgcf/fish_aquariums_and_stuff.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/8jhhuib/inox_jewelry_mens_rings.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/V7pTGQM/simple_modern_ascent_water_bottle_with_straw_lid.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/z4jfhaS/87281212444.pdfIn PDF document text
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/542462270fb5a.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/a071c95.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/6998572d-a969-4e6a-b6c7-890b4269ec86/even_if_you_dont_do_it_raw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addc41a0-a242-46df-961c-b4e5de06ca47/najuxexavuteveto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aead8e6e-5b6d-400c-b643-d14056266ba0/rapport_sur_la_pche_baie_fort_pierc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9e34af-a33f-4305-9a8f-c7c048177833/proform_xp_treadmill_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c374bfd-37ec-4722-a4f7-a82ec463a6ee/86570399780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43fbef4-594e-49b9-be27-1cbb6e2bf7e0/travis_county_hot_check_warrant_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4bfe50-90c2-4def-b9cb-730472421477/78773212264.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/23609558989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660d398e-ff6f-475e-b6ea-3ecde41e5258/34954155607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e17aee1-e594-4c57-85e4-185095b15b1a/sumumul.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_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 5868 bytes
SHA-256: 4ca0de320312ddd6f9b0ab8b030210fad65f2bf363e8f7ae4fbf21b7986846d6
font_01_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 11008 bytes
SHA-256: 3d805532138d0a72499f87ff4c6b45714b3215549983d2484bb54a7d38054663

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