Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6c685ddaf45bec…

MALICIOUS

PDF

76.9 KB Created: 2021-04-14 09:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b1c5c89403fca1186b4828d3c2e7355f SHA-1: cf7d2778728c76420bbda6162f9e283aa8bdac9f SHA-256: db6c685ddaf45becbba55fbf906e2970371242e2a7eeb0b5385ab1b06c3f659e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=acceptance+and+commitment+therapy+training+2020+online PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/4hdhiha/clue_game_online_with_friends_free.pdfIn PDF document text
    • http://borutafag.66ghz.com/32287569927.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ijkgii1/39509101459.pdfIn PDF document text
    • http://dalutufajako.22web.org/47733493756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_810269d6605a4877b4b71b80dc220ca0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/xuzejo.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/1245687007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d703e18-d31a-4e17-bb4a-0d994302aa9d/33888917355.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/gisazakunafatenoro.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_f4658bade9094865a5659102ae33b344.pdf?index=trueIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_44e136d92cf646a386321dd307272a28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b564e9a7-4576-4db3-b776-6b3350e1ae9f/4853372162.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/digakexumosisawigapukikow.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/application_form_for_phil_passport_renewal.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/10373291864.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/lujafoduwelujamuvirelobu.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/30835370721.pdfIn PDF document text
    • http://rodidop.epizy.com/63112391525.pdfIn PDF document text
    • http://jagazuzigi.epizy.com/good_answer_to_how_are_you_feeling.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_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 5676 bytes
SHA-256: aaaee6c1d4394e849bc179dc099f3fef750a7bd9ea51b4590f235a30537cd58d
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10748 bytes
SHA-256: 09314f8671fb0823e30c04f3b85dce97e3f96f60fdc61995cde03272c6799054

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