Malicious PDF — malware analysis report

Static analysis result for SHA-256 5192a3b5042331fa…

MALICIOUS

PDF

80.9 KB Created: 2020-12-15 21:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 58f7e698a093ab6690e93699e5fc84ca SHA-1: 92a3ed57b4939515967a8d682324e1c3ae226a97 SHA-256: 5192a3b5042331fa1b43a08fe469a0dcdcbc30a47c7389abc322cf5823ba283b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://trafffe.ru/strik?utm_term=clasificacion+de+las+reacciones+quimicas+segun+su+energia PDF link annotation
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/jabez_mobujagi_newubinakapar_luxugijof.pdfIn PDF document text
    • https://lewugudufe.weebly.com/uploads/1/3/4/6/134668986/rositak.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/35b4f1600cf.pdfIn PDF document text
    • https://temoxemotedi.weebly.com/uploads/1/3/4/5/134599163/tejetimoko-dawizidozof-todelawagi-rulalezexa.pdfIn PDF document text
    • https://nasakavagupudo.weebly.com/uploads/1/3/4/7/134766537/e99d0459.pdfIn PDF document text
    • https://kisupumusu.weebly.com/uploads/1/3/4/5/134513531/1c53b7cb27.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/21463513-642c-4991-9d0d-9d81ad06d8f6/earth_s_best_diapers_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6693bce-bde1-47a1-8d25-34fe1bfdd937/95261412082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c80cc-2e79-4723-b631-0c92f1054e2a/496134744.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/roxodebazejisi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566a4c89e1c4b8fdcc8ea/t/5fcecf9d0ff3944fc5480546/1607389091332/rapid_transfer_casino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c2fa49-c63f-452d-836e-116a4f687457/18032114138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34206d65-331c-4b59-9228-808857fcfcec/528265426.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/bikers_kental_full_movie_online.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_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 5292 bytes
SHA-256: f0d811587f17025f2bbf6e767060f7bb58c5c8560fd512dd7a9d7be8a0ca3713
font_01_sfnt_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 12672 bytes
SHA-256: 431a06d51509e61a650011707babe3f895bbc7b197e6090f48ec759e5c586aba
font_02_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 16092 bytes
SHA-256: 8df4adf1dfc77538e7bbd01b1fdaaf0eea79838890a5002d795cbb68f47538e8
font_03_sfnt_off00012791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12791 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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