Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2288fc0717d268…

MALICIOUS

PDF

81.7 KB Created: 2020-12-17 06:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e1c76d307cad9e1c8cce26af7296605 SHA-1: cdea14d8c77f9bbfc2bc71d41964562b0070e9f3 SHA-256: 2d2288fc0717d268fdefbcb170871b73fbcbc8b3c4a0b44e47a3b665106178ef
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a high number of embedded URLs, with critical heuristics indicating it's a redirector link and part of an SEO link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://ggtraff.ru/123?utm_term=seattle+cruise+terminal+car+rental In PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fcf1a5e807f5.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/6626d27fdb6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_5fada517a7306.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/fegorusejes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5fd7b07c2ca4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_5fd10dcd9aaeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/219fe084-0796-4408-aad0-c9e8df86b639/gisonabup.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/flight_training_manual_lesson_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11e8e16f6d44b07c01948/t/5fd032a35efba8153b1c1761/1607479974331/65658677524.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc2c4845147b148048df353/1606599818889/cpt_99211_description.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/vutuwonunovoso.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/bepobizarariniwafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced80f20-0ccf-48c0-a2bd-681ab8326e42/40379283687.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/u_s_air_force_new_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/free_halloween_coloring_sheets_kindergarten.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 4820 bytes
SHA-256: 7e9616449868d276a579c609445d7173b274233473d00e5fc4331da42999ec15
font_01_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 12052 bytes
SHA-256: 93d6b1a80a031b35ca973caf1a0aa3ea42c8b863ebb16ac0a745eadacf520834
font_02_sfnt_off00012c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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