Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fda590497ef038…

MALICIOUS

PDF

81.0 KB Created: 2021-03-08 15:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8ca643c44e4c64e3d4df931943cfb05a SHA-1: a334d9d64bc14a531def3361dfdf6b8099c6e5d4 SHA-256: 12fda590497ef038d8df451ff1d8e4436b9e18c2a7dcf86a8954117647558517
164 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt, with one specific URL identified as a potential lure. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting a phishing or malicious link distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/strik?utm_term=factor+rating+method PDF link annotation
    • https://cdn.sqhk.co/vavuvalegel/hjhDgii/pongo_meaning_in_british_english.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/94410539423.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/1ighfgM/timow.pdfIn PDF document text
    • https://fekawuzode.weebly.com/uploads/1/3/5/9/135993312/fuxesariwexap-sabefasinuse-tebojijoba.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gfIzXjq/ofertas_city_jump_nassica.pdfIn PDF document text
    • https://norabemomo.weebly.com/uploads/1/3/0/9/130969424/61a2db2.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/vewirelejakiru.pdfIn PDF document text
    • https://bijigixeze.weebly.com/uploads/1/3/0/7/130739450/mesugor.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/9gcidjc/free_easy_cnc_software.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/doxakemarixufinalik.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/oracle_database_11g_architecture_interview_questions_and_answers.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/70865588058.pdfIn PDF document text
    • https://dejewetekexofig.weebly.com/uploads/1/3/0/7/130775583/lolupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/detecting_android_x86_stuck_virtualbox.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/rascals_2011_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f65697-44a4-42c0-b7b7-7e68819a2394/54352071343.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/what_is_the_driving_test_like_in_minnesota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8541debd-5828-4c86-8224-1b68fac6d875/71589422178.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/65980413935.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/guest_book_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/black_opera_mini_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa92776-a358-4dea-ba39-ff67517b1463/what_is_learner_centered_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/calendario_civico_2019_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/atlassian_bitbucket_documentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154d4d43-35b6-49ba-86f2-00fd4649b22b/damanob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148ee39e-f469-47df-86b3-ab4b2f30a265/how_to_fix_ignition_lockout_on_ideal_boiler.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_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 5096 bytes
SHA-256: e040d34165bddd457b0224c3224c3b5404c4d42b6b724161c7e70289e8ba0b49
font_01_sfnt_off0001110c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110C 11184 bytes
SHA-256: 6df606f3b485cda98bda141edf6a53625c17538263b05815092a6e2447ebbd35