Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f11a0645107955d…

MALICIOUS

PDF

76.3 KB Created: 2020-11-14 22:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0d959741499899b4909417d263a927c3 SHA-1: 1861db7a874fb43b74bf5eb6efd9047a26013068 SHA-256: 3f11a0645107955d28f9437c6027e60e45e22f6ae0a347c67abe1286965bae52
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=lee+county+schools+va+jobs PDF link annotation
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/gifigonalawi.pdfIn PDF document text
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/sagopusubegiw-mevaxas-dijavupa-wopevimakap.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/tosudovenagivaj-ridof-voxupin.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/kuvofofurabogaw.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/pilevugigugegaveva.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/397b48ab74.pdfIn PDF document text
    • https://vaxeratomox.weebly.com/uploads/1/3/4/3/134397216/6940138.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/xodebemogawa-jodemo-mepokux.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/bevatebisoxos.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/7fce488e-96bd-498c-a20f-ec0a4961d171/teginuruvavosilidedamuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4045bc66-fa3b-4794-850e-df6e981122f7/kgf_chapter_2_trailer_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17556f06-5ec7-4ecf-a0b5-6e433c86d938/kojogobamubukusolis.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/pesukupinumifetesozazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22b357a-aa13-4e5a-a260-f7c4758ca2fd/akallarla_dans_1_full_izle_parca_tek_hd_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8618c86-1bf1-41f5-a36a-531fdd73b946/a_moveable_feast_ernest_hemingway_sparknotes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 2976 bytes
SHA-256: 4b51947f07a282bfefa749fe9c0157bafae5f151886bce6f0c1e2d15f318457d
font_01_sfnt_off0000d459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD459 5108 bytes
SHA-256: 2aa75ae7eb68a2d0d3a7cc7dc0bb4dd937cb29f2e9c988e82cabb20bebe42afb
font_02_sfnt_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 12348 bytes
SHA-256: a84375ee1f242989920ff11fff14ecd22c328e5f0809dccfc24177fd6805d87c
font_03_sfnt_off00010e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1A 16236 bytes
SHA-256: b1345b03cb8ff90cb42c7c8f61cc0a97610ec8082568e26930ee59dd54284444