Malicious PDF — malware analysis report

Static analysis result for SHA-256 909f5db4d0a90ba6…

MALICIOUS

PDF

75.1 KB Created: 2021-03-13 15:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20bdc4c4d122d9b2f90cc6389f88ae39 SHA-1: bc6d97270d6707c589e2e56e7345ce35ced04ab8 SHA-256: 909f5db4d0a90ba69971cc17853b19de04bd06bfc4fb0cad4a11b41b8df3de34
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a sale, which is a common lure for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=kenetrek+mountain+guide+400+sale
    • https://cdn-cms.f-static.net/uploads/4454694/normal_602336de84672.pdf
    • https://static.s123-cdn-static.com/uploads/4447258/normal_60010f1b51a4a.pdf
    • http://opensalon.xyz/sherlock_holmes_the_devils_daughter_infamy_solutionkqmda.pdf
    • http://reznitskygallery.com/55919952891ck799.pdf
    • https://cdn-cms.f-static.net/uploads/4462730/normal_60411aa397857.pdf
    • http://hotsales-com.xyz/sogujosabugifih3hlg.pdf
    • http://lozhobelir.space/64907112771bnw3o.pdf
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff5232d0388c.pdf
    • http://instapresent.site/biographical_sketch_examplejjg7e.pdf
    • http://mixit.info/how_to_talk_about_love_languages1mi83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nufagogofuj.epizy.com/satapisudefikozomaw.pdf
    • https://s3.amazonaws.com/midaguvimabof/create_from_html_template_c.pdf
    • https://uploads.strikinglycdn.com/files/c86e21ce-8ef3-4659-9eb1-da5dd32f5f6b/weputaxira.pdf
    • https://s3.amazonaws.com/fowonaxul/modunanalez.pdf
    • https://uploads.strikinglycdn.com/files/d26104e7-54b6-4312-84dc-d4f8256b3f68/jigelesonozibezamegeviwas.pdf
    • http://lepamiv.epizy.com/how_to_find_the_theoretical_probability.pdf
    • https://uploads.strikinglycdn.com/files/d31e9b5e-5128-4d21-824b-c5d69a7ad3b9/34740753677.pdf
    • http://dixolasafu.epizy.com/lugedusowo.pdf
    • https://s3.amazonaws.com/tigovatolis/queen_platform_bed_with_wood_headboard.pdf
    • https://s3.amazonaws.com/fatisake/ganja_smoking_pic.pdf
    • https://uploads.strikinglycdn.com/files/4166e523-a4ab-4cef-ba13-b848932a13d1/fuwezagukiludeguk.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_off0000e448.bin
e714de6ab0f135bdf870736642ac28c9d695bf89e03c510eaf2d8148426483a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 5408 bytes
font_01_sfnt_off0000f698.bin
315d77b3db6044f22707ec2e0c98d0aad40681d097b31d32d7c69c7712c3150a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 11608 bytes

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