Malicious PDF — malware analysis report

Static analysis result for SHA-256 1412aa5f7337d6f3…

MALICIOUS

PDF

82.5 KB Created: 2021-03-05 04:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc04d38442fa7496441eb54f45a03ada SHA-1: 401789e17a369a232cb7ec69a22a48914943a162 SHA-256: 1412aa5f7337d6f3c5765d415e8dcd42be4d635315e371eea978f4f86c34f29f
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 pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=exploring+psychology+10th+edition+study+guide+answers PDF link annotation
    • http://nemipenekav.iblogger.org/baxiregizivepo.pdfIn PDF document text
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/molin-juret.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/23319102323.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/6891675.pdfIn PDF document text
    • http://gijujelebalorop.22web.org/possessive_form_of_nouns.pdfIn PDF document text
    • http://vawubarisef.22web.org/lugivetimoguxunururajid.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/rotanazamapexug.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/nebobanutem.pdfIn PDF document text
    • https://bowilidorufe.weebly.com/uploads/1/3/4/6/134603038/tugipojuxis.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/rca_4gb_mp3_player_review.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/c39673ea0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_f0e0c34eb6b745f2a4561bc2dc253b8e.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_61502599f4284938bf67ea94d68a1f3a.pdf?index=trueIn PDF document text
    • http://xepalufozakot.epizy.com/how_old_are_the_gnostic_gospels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b49907-9fd4-4d84-be96-2e2b9aab1184/83766558648.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_5e5d23d55e9e4f3bb171b474606fa04c.pdf?index=trueIn PDF document text
    • http://sawopigemon.epizy.com/chevrolet_impala_2013_manual.pdfIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_dcaa4bbf68994426949ba3741be7625e.pdf?index=trueIn PDF document text
    • http://merovuditipin.onlinewebshop.net/is_there_a_natural_way_to_quit_smoking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/984d51e5-f953-47ed-853b-a08d65dfb36c/mopepevedutukonevimu.pdfIn PDF document text
    • http://povinadoli.epizy.com/paises_y_nacionalidades_en_ingles_ejercicios.pdfIn PDF document text
    • http://fabonek.rf.gd/6014090382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd43e7b-fbf4-4df0-a0c5-12c2a11138b1/front_porch_screen_door_ideas.pdfIn PDF document text
    • http://jabepujun.epizy.com/navicular_cuneiform_joint_pain.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_off00010540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10540 5748 bytes
SHA-256: 58dccbbf66af31da10b91de7f3e399de910c46b243e8e041400a1515c808ae20
font_01_sfnt_off000118f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F5 10320 bytes
SHA-256: b875ab1b35e62f3bb0cf685289800ee3ae099d011984f486ae2307d48bac654e