Malicious PDF — malware analysis report

Static analysis result for SHA-256 5692e24d654f1126…

MALICIOUS

PDF

167.8 KB Created: 2021-04-06 00:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8eba5fad9dfd2c781aa4d7f6feaef694 SHA-1: f86de5c0f3f64122e852dda60bce63bd514e4b89 SHA-256: 5692e24d654f1126a2de672b09d03447cefb7a288cacf16082c15bf5c4ad6d0f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple disposable domains, with one specific URL being https://xezojetit.ru/wix?keyword=setting+details+in+to+kill+a+mockingbird. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/wix?keyword=setting+details+in+to+kill+a+mockingbird PDF link annotation
    • https://cdn.sqhk.co/lokabawopup/ghBgdvI/55071899611.pdfIn PDF document text
    • https://tugoxovelosiju.weebly.com/uploads/1/3/0/9/130969774/sowaxiropun_dixubawinogo_ramif_jodomizuwapod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_602ee0baee45b.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/4cbaafc73bad.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/woduvadukoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_601cff382a4c4.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/5628224.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/274f9cd79.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/QrfjdFW/anger_of_stick_4_offline_unlimited_money.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/sunija.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/4iaJTie/judge_judy_kid_with_your_daughter.pdfIn PDF document text
    • https://juramezuvuro.weebly.com/uploads/1/3/5/9/135956704/zunemowilunijo.pdfIn PDF document text
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/8141666.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/lodaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_601b0dea73596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5feebb14b7c90.pdfIn PDF document text
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/3437132.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/7jfia3T/73949204505.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69498de0-25e8-462c-bad1-c9433aab4364/how_to_train_employees_to_have_difficult_conversations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a112f72-1862-4a56-91bf-3a9b84920724/39964501570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e49e157-4f53-4a80-aa08-84d7b1785993/foloniwawulafenumogetex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4938d53c-80b4-4c9c-b4cf-79a21f220ab5/10856768430.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002590c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2590C 5568 bytes
SHA-256: 26cdb03e80db9743888037ecb46b90b0dfd396632c04fdf26bb7161356583358
font_01_sfnt_off00026be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BE3 10440 bytes
SHA-256: 91c95a2d3178073d29eba137a592a0b28f08af3984eb4f2d286fdb4576b6e920