Malicious PDF — malware analysis report

Static analysis result for SHA-256 169e34d62965c77a…

MALICIOUS

PDF

78.8 KB Created: 2021-04-03 15:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 012a1471a67b73826392bd539bfafc42 SHA-1: 04f16a2a78385d6e5c8296702d5f14ac9fc946e1 SHA-256: 169e34d62965c77ad8db36db8d96e1576cb4eaef4ae86a4f3914b70c4ee8e417
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to disposable hosting services like Weebly and Strikingly. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate this is a link farm designed to manipulate search engine results or direct users to potentially malicious content. ClamAV also detected this as Pdf.Phishing.Trojan, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kaxukododeregoz.weebly.com/uploads/1/3/0/9/130969338/3728522.pdf In PDF document text
    • https://rodironamo.weebly.com/uploads/1/3/5/3/135347674/4316798460dc.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/mesa_boogie_triple_rectifier_150-watt_tube_head.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/29408738848.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/8438994.pdfIn PDF document text
    • https://womominajarizu.weebly.com/uploads/1/3/5/3/135392323/fed889.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/sixekunufegemom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_60567ca2dda1d.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/wawodavebi_mikepa_vopoz_zakona.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/vozukiwiw_jalixibutewus_kulatidosev.pdfIn PDF document text
    • https://xupovefodifej.weebly.com/uploads/1/3/6/0/136053951/sakumodud.pdfIn PDF document text
    • https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/venubemo_sazulojigosun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_6018797a8b056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=how%20to%20program%20my%20water%20softenerPDF link annotation
    • https://uploads.strikinglycdn.com/files/9ab98a96-d1be-45fb-97a2-1b2bde4639fd/zosamuligur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220c6c84-1021-4c2f-9a07-fe0bfafde7ca/where_do_i_send_my_cdl_medical_card_in_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6666f39-a7d9-41db-a652-bd0ad6b4b7fb/is_hp_officejet_4630_a_laser_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a34a05-b9a7-475f-a057-eceea33b3de2/thinking_fast_and_slow_chapter_14_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e7c9f2-b328-42e9-83a8-9d0047285475/33355176630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c269efa5-8268-4022-b8fd-80910551227f/2006_chevy_malibu_starter_relay_location.pdfIn PDF document text
    • http://gafodix.myartsonline.com/68760270950.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/66884850569.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 5344 bytes
SHA-256: 4680c3a27dee325a0f7711f04a14f83c29cd8608f4e83d3c4abe1976168545fd
font_01_sfnt_off0001086b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086B 10464 bytes
SHA-256: cb6c63fc59e8640c3b66a43bd9726a6bca00cc6e13462f7e7dcb170a7571019d