Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e333a904e11a80…

MALICIOUS

PDF

96.6 KB Created: 2021-03-28 21:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca1ea9bd474d7491b230c08ee59a9de SHA-1: d7692e092ef48876d305e0fc23cc2168157d20ea SHA-256: 07e333a904e11a800b0c11d90223c3ecb4ea057e217105c14458857a8222c419
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URL `https://bologen.ru/wix?keyword=capitulo+6+vocabulario+2+answers` suggests a lure related to educational content, likely to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=capitulo+6+vocabulario+2+answers
    • https://cdn.sqhk.co/tasewapimol/jgXQgg1/xisoz.pdf
    • https://cdn.sqhk.co/xegunorasu/gfjdhsh/zexuxigojelugisogabixeli.pdf
    • https://cdn.sqhk.co/zunezafi/wVjkwja/totaxezorisigizetojav.pdf
    • https://cdn.sqhk.co/talokelom/Wjhbiid/zombie_shooter_2_games_free_download_for_pc.pdf
    • https://cdn.sqhk.co/mafowixodi/jfOjbQT/39535138055.pdf
    • http://nefritthebestthing.site/ghid_de_conversatie_roman_grecpmpbb.pdf
    • https://zisibunekotif.weebly.com/uploads/1/3/4/9/134902626/fubaxo.pdf
    • https://cdn.sqhk.co/muvifisi/7hajfTg/53461565902.pdf
    • https://cdn.sqhk.co/bedogipaxog/Yd2hjxq/ward_island_ferry_tickets.pdf
    • http://generatorsale.ru/wordpress_template_hierarchy_tutorialmpf07.pdf
    • http://politach.com/gatasenala2xob8.pdf
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/gilafizagi.pdf
    • https://jaragamonobuwuf.weebly.com/uploads/1/3/5/3/135346236/2295275.pdf
    • https://cdn.sqhk.co/pazaxefuma/aTgdn8t/savuxuvovoganaj.pdf
    • https://cdn.sqhk.co/dopuwene/heNNhdO/dibisamunuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fewunadupop/the_adoration_of_jenna_fox_study_guide_answers.pdf
    • https://s3.amazonaws.com/batoragubukepo/68658368877.pdf
    • https://s3.amazonaws.com/sedowedi/10789608176.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/gavipixugemumifi.pdf
    • https://s3.amazonaws.com/mejobu/29360340059.pdf
    • https://s3.amazonaws.com/zabevog/writing_decimals_in_words_worksheets.pdf
    • https://s3.amazonaws.com/votubukaxogilix/comodo_antivirus_android_review.pdf
    • https://s3.amazonaws.com/lanaladu/metamorphosis_franz_kafka.pdf
    • https://s3.amazonaws.com/zisulamisozoto/line_6_bass_pod_xt_live_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136ec.bin
10d8717f160e46f173518883512a32f3febd233dab866e8c7c6bd40390ab381d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136EC 5412 bytes
font_01_sfnt_off0001496a.bin
b8ccb38dd961447efd760ae3dc87f9f47c2d7cc2bedec368a7763c32d755e423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1496A 13784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.