Malicious PDF — malware analysis report

Static analysis result for SHA-256 428de1ec301094cf…

MALICIOUS

PDF

76.6 KB Created: 2021-04-30 08:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 939fa46a2d7af7132cdb91f99bfc7016 SHA-1: 22776c6313ce40d2951f425e676da8ef0b6f3b8b SHA-256: 428de1ec301094cf6ef0f4db03707bb21aaf6df8637dc75fd4f27a81735ca4ba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The embedded URLs suggest an attempt to redirect users to potentially malicious or unwanted content, likely for traffic generation or further distribution.

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://xajibur.ru/strik?utm_term=safety+glasses+prescription+walmart PDF link annotation
    • http://lukiduxipapep.mywebcommunity.org/electrical_engineering_technology_salary_nyc.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/8614062.pdfIn PDF document text
    • http://xifizajutebov.22web.org/verb_to_be_exercises_present_simple.pdfIn PDF document text
    • http://norasidifonilov.22web.org/allomorph_definition.pdfIn PDF document text
    • http://kipoxepufe.iblogger.org/wofevasonulupiwafovokan.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/sara_ataxia_outcome_measure.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/19792064186.pdfIn PDF document text
    • https://damenuxorofupob.weebly.com/uploads/1/3/4/7/134711178/e570686cda6dea.pdfIn PDF document text
    • https://wixofixun.weebly.com/uploads/1/3/1/3/131379115/pifuvikiwine.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/best_convection_microwave_oven_in_india_2020_under_10000.pdfIn PDF document text
    • https://gagakulusete.weebly.com/uploads/1/3/5/3/135326625/tuzedarowi.pdfIn PDF document text
    • https://belabujogod.weebly.com/uploads/1/3/4/6/134696524/bipon.pdfIn PDF document text
    • http://fevozogu.iblogger.org/43410106166.pdfIn PDF document text
    • http://wezenilokiwuv.iblogger.org/gapirujukupejubasikam.pdfIn PDF document text
    • http://suzaxikuzexaw.66ghz.com/nature_meditation_music_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juludiripo.myartsonline.com/98235589950.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_4f4b2279ff3a44fbb1bd291109c55ba5.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_e990b0775dd740e3b270cc6533678a4c.pdf?index=trueIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_4d4dacb193d84a2daaa136f7d5658769.pdf?index=trueIn PDF document text
    • http://fedonefekipide.myartsonline.com/alimentao_saudavel_para_ces.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_7927f69e636a4c6bb8f620e0c1f1321b.pdf?index=trueIn PDF document text
    • http://domuromu.atwebpages.com/blockchain_development_book.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_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 5632 bytes
SHA-256: 3a21262f53c589250b93f5fd8632e415b3ddb607532c15d5f03e8ac0b5fbdab5
font_01_sfnt_off0001001e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001E 10860 bytes
SHA-256: c11f7a8cd0d1f6aaa0c5b6512c68905d20d7c4d1b2bbffeb841b1f0de73aa0e1