Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ca6dbbae456b9a…

MALICIOUS

PDF

87.9 KB Created: 2021-03-14 05:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 12476cd42dba395e1d0392ec897a4e5c SHA-1: c37b5d6c621f3cf393b8132e81505586855a9379 SHA-256: c7ca6dbbae456b9ac2411df18ae677f25ff152957a988539ab7cebba9913886c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The document's purpose appears to be to redirect users to potentially malicious content through these numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/award?keyword=pdf+akreditasi+uny PDF link annotation
    • http://sportita.fun/garmin_vivosmart_3_replacement_bands_australiap2yo4.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/83b4b.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/Xrk0igI/54630532620.pdfIn PDF document text
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/zepiz_rumudipeni_zinibuzisel_suxapewexi.pdfIn PDF document text
    • https://vorajazelilax.weebly.com/uploads/1/3/1/4/131407498/826486.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/hchjOHO/81486026137.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/99ea0903.pdfIn PDF document text
    • http://sodalabs.pro/edifice_casio_wr_100m_priceut58i.pdfIn PDF document text
    • http://svarka-aurora.online/tozejoxasipjbji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_ad5a3d396fa1490193a46edacc557aa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/tebivevanirimulakefaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/free_templates_ppt_2010.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_e5c2d777d30a47568b5791653b1bc317.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_d2cb1f3d9495433e9a96613b27bcc9f4.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_b37c95fb7a8e456db16899157121809e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/aiaiai_wireless_manual.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_38e30f8d86cb42e8b1e95cae7ac15eb7.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 4808 bytes
SHA-256: db3a2e5583aebf1b3358be6f2af37d369d0d710cb8a292265a909be5208f7306
font_02_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 10556 bytes
SHA-256: 570a95eedabb41926132f1b565b249bda29a8284338eb8d1d94be5c765536dac
font_03_sfnt_off00012ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA9 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off000143d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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