Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff0419028421d0e…

MALICIOUS

PDF

75.7 KB Created: 2020-12-22 19:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 556024622499793dc930a9b7b3a3f852 SHA-1: 8ba4936e280f533c8f3e93352c38728d56fb3a10 SHA-256: dff0419028421d0e7dc7c1ae067f203329d4c8cae39d8b676f6dff1e76360eac
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, many of which point to redirector infrastructure or disposable hosting, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a direct link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=dime+como+olvidarte+letra+salsa In PDF document text
    • https://litulivugaz.weebly.com/uploads/1/3/4/4/134463412/nikebofavok_gagixonofosenal_dogagiwedulem_xamubiwuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fdaf015adce0.pdfIn PDF document text
    • https://xidogofu.weebly.com/uploads/1/3/4/3/134307260/994e5cf24de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_5fdc176249b3e.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/wuzamubabon_binetitelule_dexoguvikiwi_xidawadorogozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5fcf2879b9558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f9481b32bf54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fa1aeae27c72.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/sumekuwijozu_sekezesokidodu_vaxexa_wemetas.pdfIn PDF document text
    • https://nuzuloluxeguvox.weebly.com/uploads/1/3/4/8/134874948/dowug.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/b8202fb3fcf30.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://uploads.strikinglycdn.com/files/bfb99e8b-d1f1-44fa-8c10-b87f403f547c/70971484875.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/nulupafutirakumodoxuzegez.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/kukigesumarinig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d51e16-d78d-41c2-820c-ca4fed532467/gegomomajeruzelipi.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
    • 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74A 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000c73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73E 4824 bytes
SHA-256: fb572823a8fbad5d84499ad39409cfb95bc3826e039febfff445c3741564ac4e
font_02_sfnt_off0000d7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 10616 bytes
SHA-256: 61bb2602e8779fcfa283558613b3453536cb0ecf757ab79de4b16ef4b18dd648
font_03_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 16944 bytes
SHA-256: 1c05e66bbf021e78ddfe64928db4f422e66058c2adcfffa48cf339176ef0c7c4
font_04_sfnt_off00011167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11167 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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