Malicious PDF — malware analysis report

Static analysis result for SHA-256 493d42f531d8113c…

MALICIOUS

PDF

141.6 KB Created: 2021-01-15 09:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7a9a08609fb9278d26b1fffa55a12fdb SHA-1: 936b71ba67c376d560d41c3d9780bb5b13e2dfac SHA-256: 493d42f531d8113cc437243c8e4d3f781242701fc719cf966b92f1c8721cc968
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics indicating it's a redirector and a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=three+rivers+pittsburgh+pictures In PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/4a8a55958e.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/hjdqiiC/chinese_fishing_boats_galapagos.pdfIn PDF document text
    • https://site-1177931.mozfiles.com/files/1177931/51377182231.pdfIn PDF document text
    • https://site-1168170.mozfiles.com/files/1168170/syberia_full_apk_obb_download.pdfIn PDF document text
    • https://soxajerufoxizas.weebly.com/uploads/1/3/4/8/134880654/3482667.pdfIn PDF document text
    • https://rebasikerebevo.weebly.com/uploads/1/3/4/0/134016880/fogimavi.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/ijgggd0/baby_ducks_for_sale_in_texas.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/2127747.pdfIn PDF document text
    • https://site-1172235.mozfiles.com/files/1172235/virus_update_by_state_map.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/fotojipifuzitul/recuperare_messaggi_whatsapp_cancellati_android_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/27345309126.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/baixar_creator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/69221821474.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/sees_candy_assorted_box_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF87 5104 bytes
SHA-256: f84fddec19779dbd6a826c8a42af099e3923588091e831ec4a4215e43e3ddd11
font_01_sfnt_off000200e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200E8 12804 bytes
SHA-256: 59dff2084d128341a8891c9c5676f3dda1b047ffacae1711c00d88f98c12d7a4

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