Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee303e610047f462…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 22:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0eea1e98e3e892fccdd774f295280785 SHA-1: cbdb405a94cdadc0e1310424933189d6f5cf4a28 SHA-256: ee303e610047f4622ec9ace922f5bbcef23daec7a8e9ba6a880ab4e1160cbf0a
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a large number of external links, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate maliciousness. The embedded URL 'https://fokemale.ru/strik?utm_term=hp+4500+reset+ink+level' is likely the primary lure, disguised as a printer ink reset guide, to trick users into clicking and potentially downloading further payloads or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=hp+4500+reset+ink+level PDF link annotation
    • http://boldly-grow.com/nikon_d5600_reviewv7es9.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/0a48272c41f3.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/dgdjbid/farm_town_cartoon_story_2_mod_apk.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/tebadepuvifumamipaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/wituguvuwuxujojodit.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/ggjgzje/69786227349.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/2hjwQig/kamaguvedajexoxawalituv.pdfIn PDF document text
    • https://befomunuduti.weebly.com/uploads/1/3/1/1/131164266/9531143.pdfIn PDF document text
    • http://sallely.xyz/motorola_astro_25_portable_cps_softwarew4jo1.pdfIn PDF document text
    • http://dutov.org/whirlpool_gold_quiet_partner_iii_normal_light_flashing3vnxv.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
    • https://s3.amazonaws.com/fekife/conceptual_physics_textbook_chapter_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/clipmaker_3_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/tagoviniseginexigija.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/what_book_in_the_bible_talks_about_healing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f670caf-de75-453e-addc-cf292c52680e/tesulezepoxidape.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/21487945851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734392d9-87ce-4205-8bb2-f2b2e7f8e7ca/dubejopixafajunofesu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/under_the_volcano_book.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/51465810752.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/figoruwupuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91334408-b6dc-4a6a-8f58-74d57178a3a9/taxiwifunojerem.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_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 4720 bytes
SHA-256: 44f6ac5db1fb7874c13609237e152a151d24840db8838afa1609f7a3d7c03192
font_01_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10452 bytes
SHA-256: dc90b0f593c431cd019687bcd29a9fea5c7d6a1759176cfb3d05abf2bc03c0b5
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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