Malicious PDF — malware analysis report

Static analysis result for SHA-256 39182f5c76f9a847…

MALICIOUS

PDF

67.9 KB Created: 2021-02-19 16:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0c48cba5ca1574992676571c76744db8 SHA-1: fc11ffad60c371dfe7808e738aee3cdaa26f8d79 SHA-256: 39182f5c76f9a84769b2ef497a7da53ab56345b2fb0aaf835fc31deb8ba59653
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=douchebag+workout+2+hacked+unblocked+76 PDF link annotation
    • https://cdn.sqhk.co/ruwonumatag/ghqgeif/wujek.pdfIn PDF document text
    • http://forsage.pw/java_basics_freeq0lyf.pdfIn PDF document text
    • http://cartest.pro/comala_workflows_user_guideh6ehu.pdfIn PDF document text
    • http://videohost.space/badojokedefutkb4ba.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/giihcKF/2980891689.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/gfijjh8/psoriasis_symptoms_images.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/fEd3Pib/kejifox.pdfIn PDF document text
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/niturekanudis.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/laxivata-rakutekavapo-fovamawilev.pdfIn PDF document text
    • https://xofezariro.weebly.com/uploads/1/3/1/8/131871505/1bd0bac224a02.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/gMkoGjb/29381769611.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/d752a84d8.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/cB7hgZD/national_test_abhyas_login_on_laptop.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/curse_of_strahd_castle_ravenloft_mapl2rxs.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/jji5jcV/electronic_music_festivals_2019.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/nagev/active_directory_domain_services_2008_r2.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/mcafee_antivirus_for_dell_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/97796656504.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_off0000ccf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF9 5684 bytes
SHA-256: 0839f0efdf67b58cbe38d95805d704c7290b6f212ced851e5ad80f8155bfdb2b
font_01_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 9948 bytes
SHA-256: 323a8f3ea95a142fd53ed4a418b9284dd192c1223651ad0bd602e1dc557d5881

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