Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc165614cd39a04…

MALICIOUS

PDF

82.2 KB Created: 2021-04-24 15:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 13ce01271e707bd6f7ed532938f1c210 SHA-1: 26e955074c3a5c063bcec03fc7c5e4da6f1d5ade SHA-256: ebc165614cd39a047cd4985a256528ca39226a80bbed0e7cd7205f50525769b7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a UTM term in one of the URLs suggests a tracking mechanism, common in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=dante%2527s+inferno+pelicula+anime+castellano PDF link annotation
    • https://cdn.sqhk.co/wodabakope/4hYTtJE/contract_killer_2_mod_apk_obb_download.pdfIn PDF document text
    • http://berefiruzo.mygamesonline.org/xuvafifovanepinafubu.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/pomotiwara_tujatexa.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/xgqiKii/30980815175.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/hjG4Rdz/barred_spiral_galaxy_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_604463c38d01f.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/hbKdjfn/nizefitobivan.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/db17f6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/amqggie/vogisegototevufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff49e98499ac.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/Yjgjggh/keximojilabe.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/ak143gg/wuxusa.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/y5hea3n/94638558318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_604313c08e379.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/wudod.pdfIn PDF document text
    • https://koximewi.weebly.com/uploads/1/3/0/7/130775363/ddb70318b0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/62392623175.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/brihaspati_chalisa.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_8d83ec8258334dcba14b83bbbfeb41e7.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_b328d0bfef8f4831af8c3f7f63c79e29.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5192 bytes
SHA-256: 795dc5ad31db9a0edee2f669d4d812289f17629859547b94d670068cdf90f2b1
font_01_sfnt_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 12216 bytes
SHA-256: 98a9ad648c7490880409846e430af92e276c6da839afa27127ad3d5fcfc6a76a
font_02_sfnt_off00012406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12406 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449