Malicious PDF — malware analysis report

Static analysis result for SHA-256 220931b7c9cdca08…

MALICIOUS

PDF

97.9 KB Created: 2021-01-08 02:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3e8cd0cad60c0afc82a5250ab79f36d8 SHA-1: 7d79a96c38df137e616886967c8d9a730c0bdfaf SHA-256: 220931b7c9cdca08514e377acc38304de1ed37c6a58c520c50d3c3d59a493a9f
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or SEO abuse tactics.

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=guide+to+witchcraft+for+modern+witch In PDF document text
    • https://cdn.sqhk.co/gefisodir/gciighR/gta_online_retro_space_suit.pdfIn PDF document text
    • https://cdn.sqhk.co/setinapas/0wghhaX/grand_central_terminal_nyc_gossip_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/jcgjjjc/13576022376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5fba18b38df02.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/kabasekudagosemezama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fd089b6e4aa2.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/pezamamijajuxeruwima.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/AhAShaD/real_razor_prank_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/0Dhihiz/superheroes_wallpapers_4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fbb5ea463a52.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/ladojenefe/bikotufa.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/ielts_writing_task_2_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/root_words_of_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/ive_become_so_numb_i_cant_feel_you_there_are.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 5176 bytes
SHA-256: a108f5a30f247a2d7f8fdee8e6b4b7e17c0613db5858bf537b995a370a9dea5f
font_01_sfnt_off00014115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14115 10636 bytes
SHA-256: 6111f0d9340fa0bbe6d6f76c040ef08a238247c2983b5f3441433a89dfad4d82
font_02_sfnt_off0001653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1653A 16060 bytes
SHA-256: c507864d0aadc315dba4d342c7d7a7f310c5c701dcd85fab0ffb90b3504392a7

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