Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1fcda53d827ea0…

MALICIOUS

PDF

82.0 KB Created: 2021-03-09 01:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 63f85309858b206a20d43d8341c030f7 SHA-1: 3bda50068518736d80853c3a6200058ef13df38c SHA-256: af1fcda53d827ea0a81c09aea3c5a490ce9a456a91f4c2feb69f6623a66e6102
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the document body's search query hint at a lure to external content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wb?keyword=do%20powerbeats%20pro%20have%20a%20tracker PDF link annotation
    • http://mishabelle.ru/9978694725831dtu.pdfIn PDF document text
    • http://stat-index-co.com/fikalapomijolawijigaji2tuir.pdfIn PDF document text
    • http://vsspb.ru/foxupavowamusozurosinuf29xa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_6019807e94ad6.pdfIn PDF document text
    • http://ecosbor.net/33664287197lazzk.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/kajatobetegativabuf.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/889125bd2b1.pdfIn PDF document text
    • http://beautysale.site/dell_latitude_7490_owner_s_manualuzjxq.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/6070999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_602fcdb7939ec.pdfIn PDF document text
    • http://grafoanaliz.ru/what_is_the_best_synonym_for_motto4fqvs.pdfIn PDF document text
    • http://tesar-krd.ru/what_is_a_slot_machine5jlmv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_600672fc15adb.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/6837372.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
    • http://nesowoxaxisaxa.rf.gd/who_owns_wgn_news.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_29881f0fda6441aab9683b3378ee9417.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_71745bb02f1f42f3907873481c24f5cd.pdf?index=trueIn PDF document text
    • http://wozurowimure.epizy.com/lumiguv.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_bf9919eac6154af3a1ae7d1912ec6831.pdf?index=trueIn PDF document text
    • http://nosifunugiwes.epizy.com/rofojusipamose.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_0094892a8e884dba9a1b72ae60a23d20.pdf?index=trueIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_e77eb5b5522d476d9ad3ba30005335f3.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_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 4980 bytes
SHA-256: 6558a113c66ce3357795fe35162a6bb896a667c7bc2fbd2a25369842d20d9399
font_01_sfnt_off00010711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10711 10908 bytes
SHA-256: 04209fd5d8aa1ba3ca794f4727b5eb45174f2b3df37793ada6609f3092e8fca8
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34