Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d335b4b286b666b…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 10:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02060055613103342e80f8a65ddeb385 SHA-1: 9f744369cc89445d31c1abcd809b46461c875f53 SHA-256: 8d335b4b286b666bf3f2098c7b971c21400f2ebc598374269962e663edf50590
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The primary URL, https://seumenha.ru/wix?keyword=hbr+guide+to+negotiating+ebook, suggests a lure to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=hbr+guide+to+negotiating+ebook
    • http://lovupijuti.getenjoyment.net/jvc_kd-r200_set_clock.pdf
    • http://lalikexitaxixix.getenjoyment.net/what_does_the_philosophy_of_nature_mean.pdf
    • http://ruluzuzadol.mypressonline.com/13965795394.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zititerawori.epizy.com/ramiforazumutime.pdf
    • http://buzanuziti.myartsonline.com/nawosedugamuwobizazodex.pdf
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_72927030a8f145d980f9923672695931.pdf?index=true
    • http://ratuvilus.epizy.com/star_trek_discovery_season_3_episode_12_cast_imdb.pdf
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_5d6c2f8588ad43e5ad67cdeae207a8d1.pdf?index=true
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_fc5001742b00463ca6c0a747afd3f578.pdf?index=true
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_0928d28438584c7fa3756f9b69e53926.pdf?index=true
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_b055d2284dd54064bdc88d01123ad8dc.pdf?index=true
    • http://sutuvufekejute.epizy.com/real_estate_brochure_template.pdf
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_5568350cc8814e22a338dde26b151368.pdf?index=true
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_08de0fde116244c29f216ff789d0b626.pdf?index=true
    • https://s3.amazonaws.com/jinotugiwomo/gubelomaxosoxalivigeb.pdf
    • https://s3.amazonaws.com/tirimofufemukat/15441645219.pdf
    • https://s3.amazonaws.com/xepululejiwof/methyl_chloroformate_phenol.pdf
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_0623c7137e7f465da2e9374c57d4947b.pdf?index=true
    • https://s3.amazonaws.com/meludav/animal_farm_character_list_worksheet.pdf
    • https://s3.amazonaws.com/firigugixujotov/6812125399.pdf
    • http://fosekor.epizy.com/vosudu.pdf
    • https://s3.amazonaws.com/mokixetat/c-8_mass_number.pdf
    • https://s3.amazonaws.com/dukajevo/55195606310.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e4.bin
e8f4d9853bfdc17fa0ddae3ba62e62c2b58b1b24fbeb540d70f656092fee7c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 4828 bytes
font_01_sfnt_off0000f158.bin
bcc7bf2b99375e09d37ee482efe89c56e831a5bd48454478e1b009b1860d73da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 11192 bytes
font_02_sfnt_off00011780.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 4324 bytes

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