Malicious PDF — malware analysis report

Static analysis result for SHA-256 629aab8bf7199fbe…

MALICIOUS

PDF

67.0 KB Created: 2021-06-01 00:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 891b282317de95a21d7b1cef4fd73ffb SHA-1: 718834b317f14c8ac5902bde0235c29e85b4665f SHA-256: 629aab8bf7199fbe3810233aefdf7a2a381d72dfb4fbd982a4e268d7d5fa3cca
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest potential exploitation or redirection to malicious content, possibly leveraging embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/pbw?utm_term=libro+los+hornos+de+hitler+para+leer+en+linea+gratis PDF link annotation
    • https://lonawojalokofa.weebly.com/uploads/1/3/1/3/131382346/dixekum.pdfIn PDF document text
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/binodanadegijimi.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/3140761.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/ledawelodak.pdfIn PDF document text
    • https://kakizizutubune.weebly.com/uploads/1/3/4/3/134351089/9252001.pdfIn PDF document text
    • https://labafapagitef.weebly.com/uploads/1/3/1/6/131637364/1411577.pdfIn PDF document text
    • https://xisasuwida.weebly.com/uploads/1/3/4/4/134472621/nitevu_salubux_jevefodidebu_sakiranamibevez.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/vojafufiguja.pdfIn PDF document text
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/bejariwigijazi.pdfIn PDF document text
    • https://numuwawi.weebly.com/uploads/1/3/2/3/132303164/malujenudemese_xuwoxukefurep.pdfIn PDF document text
    • https://geguromivakof.weebly.com/uploads/1/3/4/3/134332909/potunexaz-duzerov.pdfIn PDF document text
    • https://motovatexasej.weebly.com/uploads/1/3/4/9/134900011/ledekaxitinip.pdfIn PDF document text
    • https://xopubisewono.weebly.com/uploads/1/3/4/5/134507782/bokujetusuvi_modaxezadak_wojezekabi_pikaxovogarek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajafad.pbworks.com/f/solving_right_triangles_using_trigonometric_ratios_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d074c83b-8f62-48e2-bb9f-3b7071c83a71/best_love_story_novels_by_indian_authors_free_download.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/the_scorch_trials_screenplay.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144416958/resignation_letter_format_in_word_hindi.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144428127/sedoranenobotufipodotat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fddf1a7-1368-45fa-bfcf-a4ac16a82570/16491289687.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/does_granular_chlorine_have_stabilizer.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/gasuniziriju.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_off0000c6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DC 5300 bytes
SHA-256: c4687e10fa75e4d471ccccbe87325a2764231a581b022f5a9438ee2cb95ad83b
font_01_sfnt_off0000d8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D2 10932 bytes
SHA-256: 50d1d46891e40c6c0d4a4d36e019d5ddaf53d7a33b663f61f1c11072c28f0ee7