Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c85304bfb7e9c5…

MALICIOUS

PDF

81.2 KB Created: 2021-02-14 22:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 481a4276f57485b9d37ac6564c3fa422 SHA-1: c396609e468105b4a1d7b2a84c544e370d51b573 SHA-256: 10c85304bfb7e9c5d6f974832921c6287985991479713b7303ad8066aa38de65
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://maypoin.ru/wb?keyword=bolane%20wali%20billi%20%20karni%20hai PDF link annotation
    • http://24magazine.ru/nujobililukort7aef.pdfIn PDF document text
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/xozev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370762/normal_5fc5a5bac7761.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/votetipif.pdfIn PDF document text
    • http://regsen.website/carol_of_the_bells_piano9gjho.pdfIn PDF document text
    • http://misstourist.info/xforce_keygen_autocad_2013_windows_10859i4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_601889240e569.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/6000119.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/xenepesifetiz.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/bijevodu.pdfIn PDF document text
    • https://waniritapi.weebly.com/uploads/1/3/0/7/130739375/vakipote.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/votot-xitimoxidena.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/lagavirerirera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5fc590e84e5cf.pdfIn PDF document text
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/4483d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479222/normal_6022030c98526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5ff9f88441394.pdfIn PDF document text
    • http://sodalabs.club/51232491469ah51i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://mowilutom.epizy.com/apa_format_reference_generator.pdfIn PDF document text
    • http://vukefuxi.epizy.com/living_room_lighting_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB4 4940 bytes
SHA-256: 7144932d6863823754cd53cc7ae4cbf861e6ffdf749c737cafe9d2d254d233ff
font_01_sfnt_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 10440 bytes
SHA-256: afc002d4622ef8be6d87815f4af8bd3f53c2b6d87ed1ce0d1cbecadd2f5db977
font_02_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 16256 bytes
SHA-256: 03988a9092affe8cc98f3677e33c8fa182f41301e5916a37dacd6dda352cb10c
font_03_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 4832 bytes
SHA-256: ff712d4dc95fc64994cef9605b39fc67858399de8032f73554db9ee39539ae28

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