Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddf6359ebd29be8…

MALICIOUS

PDF

87.1 KB Created: 2021-05-07 15:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b4f396db73b87cd7d641a53fae78004c SHA-1: 3e43ef3b75916ed6802bb7d995d7cf7c782b40ea SHA-256: dddf6359ebd29be856661fc662f76ece82f0369ca3dd5799d1e41722a65da578
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with a primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=adivina+quien+soy+megan+maxwell+cuantos+libros+son PDF link annotation
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/3130327.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/how_to_use_ipad_for_teaching.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/what_is_acts_of_service_love_language.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/kamifavaka-padugofemi.pdfIn PDF document text
    • http://moneyindia.site/sunsun_hw_3028479m.pdfIn PDF document text
    • http://gavojutopubiri.getenjoyment.net/asean_integration_philippines_education.pdfIn PDF document text
    • http://opssmall.space/binary_options_price_action_strategyyutmy.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/xowugevodak.pdfIn PDF document text
    • http://apparentlyopt.com/how_many_red_letter_words_are_there_in_the_bibleczdxl.pdfIn PDF document text
    • https://nonupipo.weebly.com/uploads/1/3/4/7/134767860/tipifafaw.pdfIn PDF document text
    • http://xotujezal.mypressonline.com/vande_mataram_song_lyrics_in_english.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://wojibikifi.myartsonline.com/40995512468.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/nakapimomuxiferinipe.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/xezivugejolaxitupox.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/peavey_classic_50_50_power_amp_schematic.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/70562599931.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/84907966760.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/cgnx_earnings_report_date.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/bupokudomawirijij.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/82998012987.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/28898375260.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/resisejaxevokupamilizeli.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/75238637403.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/gesakimatedadufuvaza.pdfIn PDF document text
    • http://timagugovoxo.onlinewebshop.net/abrsm_violin_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/ashton_woods_san_antonio_jobs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 5716 bytes
SHA-256: 636a1883ec7c7bf122581271f0892813666960f5dd82fd4b7c7a6639cfe55507
font_01_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 12148 bytes
SHA-256: cb5d0361cd4f9e0884a64556773087dbd5409cd9f90e449a52155488c3d36c8b
font_02_sfnt_off00013e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E01 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378