Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c434bf22037d43…

MALICIOUS

PDF

84.4 KB Created: 2021-04-01 02:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9fe65b1cc588115d2a05715e60c93e12 SHA-1: eaeab5a052cd9b63f848a37a42b56ba14dacaee3 SHA-256: 79c434bf22037d43a684eaeee845782834574ef648a323bbeea5190cbc808bbc
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and a machine learning classifier, with heuristics indicating it contains a large number of external links, characteristic of a link farm or phishing lure. The embedded URLs, such as https://zajinet.ru/aws?utm_term=pmbok+guide+5th+edition+pdf, likely lead to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/aws?utm_term=pmbok+guide+5th+edition+pdf PDF link annotation
    • http://checkmyscore.info/integrated_reporting_of_wildland-_fire_informationbfluf.pdfIn PDF document text
    • http://mp4.design/fanunagugam5neie.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/lobisisozudotibavuxalide.pdfIn PDF document text
    • http://vidclips.design/archer_farms_hickory_smoked_spiral_ham_cooking_instructionskar8i.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/66987515079.pdfIn PDF document text
    • https://kugatovobubusub.weebly.com/uploads/1/3/4/6/134680339/9253792.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/god_said_it_wont_be_water_but_fire_next_time.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/4094280.pdfIn PDF document text
    • https://fokakumunimu.weebly.com/uploads/1/3/4/2/134266115/54e4f205dae.pdfIn PDF document text
    • http://levantemosaic.com/can_you_do_multiple_words_in_scrabblei1mcq.pdfIn PDF document text
    • http://iclod.tech/kudofogijy1sx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadudenomo.onlinewebshop.net/38173996836.pdfIn PDF document text
    • http://giwoxut.rf.gd/mepowofabunamoxadiluxol.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/98681821290.pdfIn PDF document text
    • http://kotidaw.epizy.com/8523841396.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/59294606105.pdfIn PDF document text
    • http://setevibebevu.epizy.com/56126109246.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/derechos_humanos_definicin_caractersticas_y_objetivos.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/najajajodugedotifoguboka.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/lawawekujivesojapuwalata.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/logitech_g710_switch_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/how_to_calculate_combined_cycle_power_plant_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/act_2_scene_2_hamlet.pdfIn PDF document text
    • http://filamejukak.epizy.com/body_builders_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/fudodewa.pdfIn PDF document text
    • http://temiruxol.epizy.com/bloody_valentine_james_patterson.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/surface_area_of_cube_worksheet.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_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 5268 bytes
SHA-256: 9fcc4c37eaddecba6dfaa548259ff7aaa911620e09e68a85b305410aa1395a06
font_01_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 11792 bytes
SHA-256: 044a577c4acb5f717737ad48511b526da2037d77719414604a0b4750fbcd0d39

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