Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47e760bd412f17b…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 00:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 793d57aaef0f878b857e2507aabfd4c9 SHA-1: 25194835931d6575983e09ce5e89b581e5fa409e SHA-256: d47e760bd412f17b0a4b5e2ce30141752b9ca870e835f61a408b52f1cbec0fb3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or redirecting users to malicious content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload or final destination.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=victoria+secret+unsubscribe+mailing+list In PDF document text
    • https://javimitama.weebly.com/uploads/1/3/4/3/134349319/7047537.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/kogupevofa.pdfIn PDF document text
    • https://cdn.sqhk.co/mapibeze/xoyia9x/direpozop.pdfIn PDF document text
    • https://xogiwudib.weebly.com/uploads/1/3/4/7/134715522/navirozaxoteti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_602a46a53d894.pdfIn PDF document text
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/sufide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_6009036ad476f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fceda7ba8082.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/bTjgja4/cn_superstar_soccer_goal_apk_2020.pdfIn PDF document text
    • http://kolomakive.iblogger.org/88792705225.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/e4a13a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_4b69a8bbfd674b1daf056a74a13fc9d9.pdf?index=trueIn PDF document text
    • http://duxegejuw.atwebpages.com/what_do_daring_mean_in_spanish.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_e5668ce6cd994607ac94935348efee87.pdf?index=trueIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_7d405e4a5dc74e68bf23aa285b948a1c.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_aa062e6f6742452387fe706e69461146.pdf?index=trueIn PDF document text
    • http://redubemupaluk.rf.gd/asmaul_husna_with_urdu_meaning.pdfIn PDF document text
    • http://tiwemevi.rf.gd/vexugadepekajekatew.pdfIn PDF document text
    • http://narazawumeked.epizy.com/ar_15_optic_iron_sights.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 5224 bytes
SHA-256: e5ea090ffe244350241c785e46d15aad149f4c5ece117f8a46dbda96ca103572
font_02_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 10692 bytes
SHA-256: e7daa4f2abca9da097ab283ec99a3b11d9763506ee0d7a949511f8982c54bf5b