Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad4f1074595f80f…

MALICIOUS

PDF

74.7 KB Created: 2021-01-10 10:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 30135c8ea52fa349a2e7a69cca9f51b7 SHA-1: 9fe3a07f35a4218cf55b6b6945e2867589e24c05 SHA-256: 1ad4f1074595f80f90dd6642f7cf9c2e17395dfa85cbd9d2faa4e1001eaa9045
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs that point to a link farm, with one URL specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external PDF links suggests an attempt to obscure the final destination or to appear as a legitimate resource.

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
  • 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://traffmen.ru/123?utm_term=creative+visualization+workbook+shakti+gawain+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4371800/normal_5ff1dba910243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5fa87b398d421.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/obghZDp/lurubomamuvagutazatav.pdfIn PDF document text
    • https://cdn.sqhk.co/bezizafosu/ghbzgck/plante_vs_zombie_garden_warfare_3_ps4.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/banuxol.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/7jbg5Mm/the_jackbox_party_pack_7_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5ff80b5ec6413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fb8165fb2849.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/gf8ghaN/yougov_pulse_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/hg08Uih/origami_heart_box_easy_step_by_step.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492588/normal_5fc9ec1b015e5.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/37025724644.pdfIn PDF document text
    • https://suranetu.weebly.com/uploads/1/3/4/4/134458043/jifanadu_dofujamib_takugujaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 5612 bytes
SHA-256: 949c726b05ac824f48825e93e97ef85d28823e5e84610a74118f5131b6c81c75
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 10812 bytes
SHA-256: d97f141b178238f9b02ea5d8d88c32ddec9a6b699eabc382dc25de8fedea5f3c

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