Malicious PDF — malware analysis report

Static analysis result for SHA-256 2976923b25af270b…

MALICIOUS

PDF

74.9 KB Created: 2021-05-10 02:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 782f9e13467d1edad1174e3c80c66642 SHA-1: ef3cc079513f9f6a98f4acc905318ac6085c6356 SHA-256: 2976923b25af270b98944078143a377744a40ec71f360f582cc2939ba6fe33f9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics flagged this file as malicious, specifically as a phishing trojan. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=tissot+t+touch+expert+solar+titanium+fiyat PDF link annotation
    • https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/zulomirowaze-pikonab.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/chhNjeR/jeniwisoruborarovebarul.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/bugogadolonavupe.pdfIn PDF document text
    • https://jezelide.weebly.com/uploads/1/3/0/8/130874318/ce9e8.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/kesagesokazog.pdfIn PDF document text
    • http://hallop.xyz/kowazozusiximipopufokxqoah.pdfIn PDF document text
    • https://duxezixupedad.weebly.com/uploads/1/3/4/0/134095883/9505020.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/YhabOgj/wudekidafax.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/dogogivuwewomegekufo.pdfIn PDF document text
    • https://pozivikebesar.weebly.com/uploads/1/3/4/7/134759309/7543883.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/c7fdf78b29c4cf.pdfIn PDF document text
    • http://fartook.online/gotemalomefe8ct.pdfIn PDF document text
    • https://pefeduvoxonix.weebly.com/uploads/1/3/4/0/134017609/225f65c.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/racyife/pixel_dungeon_tips.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/mobibezixused.pdfIn PDF document text
    • https://vedifejoroda.weebly.com/uploads/1/3/4/5/134521361/gupusezavupenav_jerinajad.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/dBrJC6k/directv_app_login_error.pdfIn PDF document text
    • https://tumirovuwepilu.weebly.com/uploads/1/3/4/6/134603677/zofawekagus.pdfIn PDF document text
    • https://kukatuvitakutir.weebly.com/uploads/1/3/4/6/134690336/4566236.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/855641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_962f00d01940439698d6b8cb9734e5e2.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_a5add5be2f9e4a71a3f314cb97aaeac4.pdf?index=trueIn PDF document text
    • https://6ba812fd-7407-468e-a879-d7284e591ed6.filesusr.com/ugd/31a575_b2da1e32fdfa46ca955b532a949238ce.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_9ca37878b2a94817a44d78c63e468ff6.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_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 5372 bytes
SHA-256: b23ce4c16e44853f56c5caad565d747bf9d3e6f1215e6347dafb9eb192bddf82
font_01_sfnt_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 11892 bytes
SHA-256: afffc9be56f124ac59fc9161fb274caa429bdd7ee85392e9f6757f346449e14f