Malicious PDF — malware analysis report

Static analysis result for SHA-256 7057a6d2357d7173…

MALICIOUS

PDF

74.4 KB Created: 2021-03-19 12:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc8ae58df4e22eae9c235f50077de22b SHA-1: 5ddcca3e2a72452b2fb70e92e0b104daa488d22c SHA-256: 7057a6d2357d7173ac2177780fa526b09b976940d7ba6f1ebe4ccc424b873c4e
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 0.9997

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://nipisod.ru/wix?keyword=parker+o+ring+manual PDF link annotation
    • http://sijubuwejipamun.mywebcommunity.org/antimicrobial_therapy_in_veterinary_medicine.pdfIn PDF document text
    • http://pedakuf.22web.org/maxi_cosi_pria_max_vs_85.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/xotonabavu.pdfIn PDF document text
    • http://streamsweets.com/among_us_character_colors_purplelppwm.pdfIn PDF document text
    • http://igonlinesupport.com/8920439788hr53b.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/wetherspoons_menu.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/99005925022.pdfIn PDF document text
    • http://punaweb.iblogger.org/81677703829.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/astrologian_divination_guideewos9.pdfIn PDF document text
    • https://moredotaze.weebly.com/uploads/1/3/0/7/130776260/soxinotu-vasat-sumoviruvol-gifimijizelep.pdfIn PDF document text
    • http://stickerrus.ru/big_green_egg_turkey_cook_timezgovh.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/the_great_rat_hunt_summary.pdfIn PDF document text
    • http://remontvorot24.com/97759924115p94nx.pdfIn PDF document text
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/a353fb131a1f2d.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/nedijowewoded/voxakujelidirebegelo.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/iisr_worksheets_2017-_18_half_yearly.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/nasiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/will_netflix_make_a_season_2_of_the_witcher.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/mr._coffee_10-cup_coffee_maker_optimal_brew_thermal_system_parts.pdfIn PDF document text
    • http://gaxijejazaxedaj.epizy.com/ada_guidelines_for_diabetes_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/molemi.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_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 4892 bytes
SHA-256: 1d0b4da0bfdd46d105877b9daaba069108cae6d035799c07d5464d30a63cb760
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 11000 bytes
SHA-256: 5c92f061c62da87819b2b633c5fdf9bf8f97bd449ee07d3d841c5d46ab21a036

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