Malicious PDF — malware analysis report

Static analysis result for SHA-256 25282013e49e0035…

MALICIOUS

PDF

81.1 KB Created: 2021-04-03 06:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 56bac18454c5ceacbc0fbe87a0d98768 SHA-1: 25d061a6022c421b07a3fab4fc03f3d06a316823 SHA-256: 25282013e49e003504995becf71c0060ab8a98296ca3cc3b66b154aca4ea7071
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this as malicious, specifically a phishing trojan. The presence of external URIs and a link farm suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=tissot+t-touch+connect+solar+user+manual PDF link annotation
    • http://activa-fb.com/blouson_semi_formal_dressjuaza.pdfIn PDF document text
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/7d3e3efe47dcaf.pdfIn PDF document text
    • https://vomogavuxif.weebly.com/uploads/1/3/4/7/134762738/651047.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/557977047256.pdfIn PDF document text
    • http://migerov.xyz/vabadixu8rt5n.pdfIn PDF document text
    • https://vipomumukewa.weebly.com/uploads/1/3/0/8/130813786/2a6d3535ddfdba4.pdfIn PDF document text
    • http://alisabor.design/fokego4ccdn.pdfIn PDF document text
    • http://brandframeb.com/cet_key_answers_2019uuder.pdfIn PDF document text
    • http://natur-bio.space/54035030205zp3f.pdfIn PDF document text
    • http://phtech.site/541749933398e73a.pdfIn PDF document text
    • http://zesamoa.online/17328815503y8ae.pdfIn PDF document text
    • http://hamlikjorettoop.ru/buzeretalipamolukunistnmx4.pdfIn PDF document text
    • http://mainsale.info/night_marchers_movie_onlinekea7u.pdfIn PDF document text
    • https://tiwozujipi.weebly.com/uploads/1/3/5/3/135317022/zovavixofa-jibamoje.pdfIn PDF document text
    • http://igcopyrightclient.com/turtle_beach_ear_force_px5_pc_setupdeb20.pdfIn PDF document text
    • http://bestsaleshopin.xyz/wazunugasubisvk103.pdfIn PDF document text
    • http://kamaz-ftc.com/zanekolibovusurijakuwuwo6n4no.pdfIn PDF document text
    • https://gifuliranofave.weebly.com/uploads/1/3/0/8/130873810/1066322.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/zagubip/i_q_test_in_urdu_with_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/ninja_blender_green_smoothie_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/62966178474.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/graduation_invitation_printable_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/wotokofaludutesuvofuser.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_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 5020 bytes
SHA-256: 11e80b491149dd591b5b41b4e30b48fc507054a0b223e513e0d1de3b13759f9c
font_01_sfnt_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 10608 bytes
SHA-256: 1790dfc87be9091a612e9976bea303ed4f6e38251c781e575ec968eaa5a21565

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