Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67d0079db84dc09…

MALICIOUS

PDF

77.7 KB Created: 2021-03-18 01:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a9332b7204761b7cd7517f574add0f6b SHA-1: 9abf87e98b67266940421f7ac9d8c806375b1a2f SHA-256: f67d0079db84dc0915a016be158e4caf610681e2c2337730bc8277eebd699ea6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/award?keyword=makkar+ielts+speaking+may+to+aug+2020+pdf+download PDF link annotation
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/3358737.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/jivigitapiwagaturade.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/how_to_remove_memory_from_casio_calculator.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/lubajos-sujirok.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/m7Sjiid/word_finder_scrabble_anagram.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/7236563.pdfIn PDF document text
    • https://cdn.sqhk.co/xogiwusumo/azifhiw/josuvuxawido.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/aathi_kaththi_cover_song_ringtone.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/Rhc0Rgf/road_racing_bikes_for_sale.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/nezivobogipe.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/76085243892.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/fC8jced/sovibukumuzipuxekag.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/alternaria_solani.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/starbucks_mocha_frappuccino_calories_uk.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://tisafedipedev.epizy.com/runir_2_documents_en_un_seul.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/nulilewozodabija.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/43651943437.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/you_just_want_attention_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/totazibozenawe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/fake_military_id_card_maker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/wobozeviwuzimemowopil.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/angular_formgroup_get_invalid_controls.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/actron_autoscanner_plus_cp9180_manual.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_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 5780 bytes
SHA-256: b68ff4877762718ba6f6ed3df2d5ce8f018dbd55ec84bd0f13af88bb2044e4fc
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 11008 bytes
SHA-256: 73bba3010dbfe64904f66540a0a6222172147a9fac89f29f90ca8f599c5bfd5f
font_02_sfnt_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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