Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e9f6385e0490a4…

MALICIOUS

PDF

87.6 KB Created: 2021-04-15 11:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b3ce0d192087b738139e8f6d1ca76c03 SHA-1: 6725e275d24e11be6a0fa4a27f37a5b4112adf8c SHA-256: d0e9f6385e0490a49903f69fa4c472f405bf6df492ae9cb51992a1a3dc5b1f66
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or scamming by directing users to malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://jacksth.ru/strik?utm_term=12th+ethics+book+back+answers PDF link annotation
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/numomovuzez_xomiponexu_zewapa_nemuwawimibax.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/7085844.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/mesufapasatak.pdfIn PDF document text
    • https://bebezirowud.weebly.com/uploads/1/3/4/3/134371107/xosafewajor-godezagati.pdfIn PDF document text
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/2397298.pdfIn PDF document text
    • https://pumavamevimi.weebly.com/uploads/1/3/5/3/135391045/25d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462339/normal_60582f27154c5.pdfIn PDF document text
    • https://gugajapu.weebly.com/uploads/1/3/5/3/135330564/1438575.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/389f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_6060bb5af165a.pdfIn PDF document text
    • https://falesejus.weebly.com/uploads/1/3/1/4/131483218/dedag.pdfIn PDF document text
    • https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/7444965.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/3473160.pdfIn PDF document text
    • https://teguvazotumeli.weebly.com/uploads/1/3/4/0/134041540/kidififetiwejego.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/ketoja.pdfIn PDF document text
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/sewuzerowivuguka.pdfIn PDF document text
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/xirakel.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/kesodidujeki.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/zojitanab-sosufodon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/grid_paper_1cm.pdfIn PDF document text
    • http://zimopup.myartsonline.com/how_to_install_logitech_extreme_3d_pro_joystick.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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 5240 bytes
SHA-256: 9ad67deb92ddc5bf7e7dbfe2921256ae579196f397e422991f7894db36b6be02
font_01_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 19240 bytes
SHA-256: 56134f9ef9f48ab0b449fcc7de5eadafd81e0d635aa7a62bd87fdc877e58543b
font_02_sfnt_off00012a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6F 10688 bytes
SHA-256: 2f981e0707891bb3a1d1dadf69859abb91e872c1b8a97b387e3622ec37d7e9c7