Malicious PDF — malware analysis report

Static analysis result for SHA-256 e985175f490cdbd7…

MALICIOUS

PDF

81.6 KB Created: 2021-06-03 03:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 88c6041061ff0da451666f997d2ba655 SHA-1: 47d58f227e9b077b396e0977c3f7800e54a45a93 SHA-256: e985175f490cdbd7ad6700892d387c356c4e7d3de4c027456a746364df2a5ea9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to manipulate search engine results or distribute malicious links.

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=alarma+viper+3400v+manual+espa%25C3%25B1ol PDF link annotation
    • https://mijeridofuba.weebly.com/uploads/1/3/4/6/134677835/2005851.pdfIn PDF document text
    • https://bisitewo.weebly.com/uploads/1/3/4/4/134496646/jalenojosumere_vamadinekut.pdfIn PDF document text
    • https://zolopopi.weebly.com/uploads/1/3/3/9/133999976/3269437.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/1617782.pdfIn PDF document text
    • https://vedoxugubizo.weebly.com/uploads/1/3/4/3/134348858/mufurefotifis.pdfIn PDF document text
    • https://lutovadefok.weebly.com/uploads/1/3/3/9/133997447/tanadusigeti.pdfIn PDF document text
    • https://mobejameraxoluv.weebly.com/uploads/1/3/5/3/135316129/bilizifapemi.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/1dca01912a14e7.pdfIn PDF document text
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/dijomusiju-zenijosejewidew-rujepafawegagal-xodef.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/wilajupafipi.pdfIn PDF document text
    • https://juvidefe.weebly.com/uploads/1/3/4/3/134319267/lovum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144524811/death_note_how_many_notebooks_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9aa44cb-4d95-4ea2-bc01-9286ca353656/rca_rcr312wr_three_device_universal_remote_control_codes.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/31479759591.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144423651/muferixabenekux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b32285-c342-4c1c-a5e3-53e90f96a41b/pujutobavajuli.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/f/kamadasu.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144522714/jegevepapizulu.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/how_does_scout_describe_mrs_dubose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2f7073-f1e2-447c-8713-c6f95a1d0931/acido_cloridrico_struttura_di_lewis.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_off0000fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD55 5620 bytes
SHA-256: 8273016a4e4011b675168c1b7bbc9fcb01974c875370bbda0d0a922e14fb142e
font_01_sfnt_off00011021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 11876 bytes
SHA-256: ecc0a840c7eb7067ed23ee206cba312cbc1a9d13bb5a33a8338bc0782c477b48