Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c244f4c466eeda9…

MALICIOUS

PDF

102.6 KB Created: 2021-04-05 20:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e28b95c243124e66ffe7029408a57ab7 SHA-1: 6a94a279b1d8d63bc08406da09f91f4f657d9fe1 SHA-256: 5c244f4c466eeda9b45fb890392453fa1d754145b64184eb3c92bdcbff6eaa1e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/strik?utm_term=what+does+360+degrees+of+separation+mean PDF link annotation
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/buzavas.pdfIn PDF document text
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/32bb0.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/kewogilokup.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/41c2d.pdfIn PDF document text
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/romisivosisodola.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/foneluvebodasomub.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/20cc632b7c.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/5843442.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/fugodarixat_rewesab.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/4182f.pdfIn PDF document text
    • https://furujito.weebly.com/uploads/1/3/1/3/131398045/forewuvugoto.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/49f5493d3a377.pdfIn PDF document text
    • http://dukozodi.iblogger.org/ansys_spaceclaim_19._2.pdfIn PDF document text
    • https://fozaxuvuten.weebly.com/uploads/1/3/3/9/133986835/4141571.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/lujudiji.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/xamoputo.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/f6730324d7a6.pdfIn PDF document text
    • https://rixidagetowema.weebly.com/uploads/1/3/4/6/134612143/bodonuxunutelixiba.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/306c1ddf-5e3a-409b-88ce-b587bd852e6c/77250682887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26297d5a-a9b6-4786-83e6-afd815b9eb6d/wakimuzutifumipovavugise.pdfIn PDF document text
    • http://guwitus.epizy.com/jabajatoxudosowadu.pdfIn PDF document text
    • http://deneboj.rf.gd/famajuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e36667-45bd-4140-a362-a644676fa69d/half_value_layer_of_lead_for_tc-99m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bff6b3-a430-4e15-a3a9-909a19227d73/wuzojuzegesuveko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de68ec8f-2f85-47c5-93a1-0524e90f4ac9/honda_civic_hybrid_2006_price_in_pakistan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14365 5684 bytes
SHA-256: 5e0a7a1abc5adb716207b4d5adbbb5c5446fa2df77b536b7cf59addeb5361eea
font_01_sfnt_off00015693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15693 12344 bytes
SHA-256: f8a2480c99102f0e01d7760a4f85e9a4775cf340211dfbb70fb21fd2805db7eb
font_02_sfnt_off00017e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E80 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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