Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae19b5ede6f661cd…

MALICIOUS

PDF

82.7 KB Created: 2021-03-30 02:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0862cf0a420ed7273b5ecb53502e4f42 SHA-1: f6202d0dd26283dc09dc8f62b05323253453b457 SHA-256: ae19b5ede6f661cd24b5cdad66070470b33b8a5f0b071a087b7f65f18b5dcb6d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. Heuristics like PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggest a phishing or malware distribution intent. While no scripts were explicitly extracted, the nature of the link farm implies an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/123?utm_term=meilleur+livre+guide+new+york PDF link annotation
    • https://powilumoratome.weebly.com/uploads/1/3/4/3/134368047/wiwixudekeme.pdfIn PDF document text
    • https://zopokobo.weebly.com/uploads/1/3/1/3/131383813/tetigadokinobunotolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_6028553bc2894.pdfIn PDF document text
    • https://fiximumar.weebly.com/uploads/1/3/4/3/134345920/2308562.pdfIn PDF document text
    • http://arendagg.xyz/apn_nrj_mobile_pour_android2bbzu.pdfIn PDF document text
    • http://yarrebitteh.online/physics_workbook_answers_marshall_cavendishpo1m7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_6024cc2b1d75a.pdfIn PDF document text
    • https://kebomekol.weebly.com/uploads/1/3/5/3/135349545/wazitarejixujipefag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453338/normal_5fdf198b85743.pdfIn PDF document text
    • http://poradoit1.site/fogomobes0b4k0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_602d7c56d18af.pdfIn PDF document text
    • https://moliveje.weebly.com/uploads/1/3/5/3/135323163/gagimafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/699fbb5e-56d2-4fd5-acfc-93f71f2146d5/garmin_nuvi_1390_lifetime_updates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4a0b73-bb7b-4b6b-9008-af9ccbac47b6/pofomopaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee55abc-c6fc-412f-8e6a-90964fa8533d/84424336172.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_77774e2091a44da3a39b239a7402f901.pdf?index=trueIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_b70e1fbe1a70425e8b3a50314daac3d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a835187d-2dc6-4462-a9d5-6fa82198e98b/tofidukepijewixu.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_ab617055ae4640d998a9a008c9923c97.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_4032827ac8984b518797b0a87616d26c.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_a2c8d58713a04182991924c08706d741.pdf?index=trueIn 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_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 4928 bytes
SHA-256: 841e267086ae639bd502c5466d5bb2e4cb9c387a30b6c4915fe3eb3c3accb5a1
font_02_sfnt_off0001146e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 12188 bytes
SHA-256: d242ca060f3abab4f8f89ff493dec452f01d67e9695633ea371680573704f3d2