Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d14ba624fea02a…

MALICIOUS

PDF

72.2 KB Created: 2021-01-13 13:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 02e8d71ed5c76fe32704d5214fbe0350 SHA-1: 97fbf3b95eef972563045acfedf208f19436d202 SHA-256: 32d14ba624fea02a3ef2fff38e6eeeba415359b94d0ed66ce028a2e768361710
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, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs likely serve as a lure to download further payloads or redirect users to phishing sites.

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://traffset.ru/aws?utm_term=2019+monthly+calendar+with+holidays+pdf PDF link annotation
    • https://cdn.sqhk.co/monasomeb/YdihNhd/virus_games_unblocked.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/2ae00c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5fd94bc693a96.pdfIn PDF document text
    • https://bikiwilusi.weebly.com/uploads/1/3/4/5/134512037/a65b27f9413d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5fc46ccf7da97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fd38b19f20a1.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/xesewuwijiwuvupifida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ff858b285042.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejexe/25255156371.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/adb_integration_android_studio_3._3.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/canon_in_d_pachelbel_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/brochure_making_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/ate_ve_su_2_yandex.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_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 5976 bytes
SHA-256: 53783be0271314a435ef1ac43a7e369998ee34e95adf6db18061c0726cb439ce
font_01_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 11100 bytes
SHA-256: 1cf9e9cedc001d7d044adb7fbed77c86da3d2cbdcbe9e5e968a8a284a1005029

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