Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbf48a7a75006ef…

MALICIOUS

PDF

80.4 KB Created: 2021-04-25 05:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f7bf47de0db4c1e884744dfcf1b103d9 SHA-1: 18ed6e1a2696a05d0bbac85e3cd04025f5e322fc SHA-256: 2dbf48a7a75006efc2650617f218ebe3127ca59f7e4be85b430ccb3c3b578d4b
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 are SEO-themed and point to benign-looking PDFs, but one critical heuristic identified a link farm. The primary malicious URL, 'https://baarspo.ru/strik?utm_term=intermec+pm4i+user+manual', suggests a lure to download a manual, likely to disguise a phishing or malware delivery attempt. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing/malware distribution intent.

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://baarspo.ru/strik?utm_term=intermec+pm4i+user+manual PDF link annotation
    • http://masanakepatarar.iblogger.org/miocardiopatia_dilatada_etiologia.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/TDnieOJ/push_and_pop_in_stack_example_in_c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fdd8011a8001.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/SdVZha6/mejatozeranaxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_60486084e872a.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/wiwamoxamo/where_to_buy_pads_for_tens_unit.pdfIn PDF document text
    • http://wokupuwijose.rf.gd/tamil_to_english_dictionary_book_free_download.pdfIn PDF document text
    • http://wadaxijenazide.epizy.com/best_logo_maker_app_for_iphone_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/36555900036.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/85455448355.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_f25012f31e1241708ff479b37c3fff83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/los_generales_de_dios_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/rojonivejux.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/nipid.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/what_causes_a_front_load_washer_to_leak.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_ebffa67bd95a456189704be44502b05d.pdf?index=trueIn PDF document text
    • http://puzawibopuxeluv.epizy.com/nokupilupokera.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/ableton_10_manuale_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/54165736717.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_4573871957d74a03b381800e0328227e.pdf?index=trueIn 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_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 5104 bytes
SHA-256: 2d78c34d97bbc473e8e37e44018a4fd7edaf1a03aef5203e055492061b186388
font_01_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 10984 bytes
SHA-256: 1a75e7ddd216908946d51f4a2ab3974c9cd96831acdcc5fca8513f89442dc0a3

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