Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de301b9e6769a79…

MALICIOUS

PDF

85.1 KB Created: 2021-03-09 14:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 80c4aee0bff9c479aeb100aa4f3ffb72 SHA-1: 9eb4c71c143ed2f168d8782fd05e542f582c8ba8 SHA-256: 7de301b9e6769a79448c91c72f66e87ad1f7f6e9606a79393763c4d1a3b5d378
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/aws?utm_term=is+flipping+a+tractor+tire+a+good+workout PDF link annotation
    • https://cdn.sqhk.co/segevenujuka/gipOImw/32333150114.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/lagu_bastian_steel_lelahmm78e.pdfIn PDF document text
    • https://levibaxa.weebly.com/uploads/1/3/1/4/131408620/94e3d49c5dd47e2.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/gf0SdGN/la_reina_del_sur_3_capitulo_1.pdfIn PDF document text
    • https://xubejuvanexog.weebly.com/uploads/1/3/5/3/135311054/0594dfff.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/bosokuk.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/X9ziaVY/56056876712.pdfIn PDF document text
    • https://lefazevi.weebly.com/uploads/1/3/0/8/130873710/mutowajuga_vetagupunoxa_rifirikumux.pdfIn PDF document text
    • http://bestcreditcheck.info/84892544324653mq.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/Hihif5C/cut_and_paint_mod_apk_download_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/XhjUQeS/51246110228.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/ieNgfjj/xijifegigubij.pdfIn PDF document text
    • https://tazumeter.weebly.com/uploads/1/3/1/4/131438167/e77ba61637bf2.pdfIn PDF document text
    • http://gmetry.online/the_tell_tale_heart_insanity_plea_answers1jii0.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/gSIhdpH/bixugititokopedizarakores.pdfIn PDF document text
    • https://xexofukirusolim.weebly.com/uploads/1/3/4/8/134871283/xokolulagorason.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/b808560f9dc3.pdfIn PDF document text
    • https://dawokopo.weebly.com/uploads/1/3/5/3/135314789/560cd9.pdfIn PDF document text
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/3525288.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jMibsRE/17361588611.pdfIn PDF document text
    • https://vatipevik.weebly.com/uploads/1/3/1/4/131407386/zuxulofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_aa4650ceaf6c4ac6afc7f03dbd470d5a.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_3fea585b5f3c46e7b00607fd1635496b.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_867df47e7b7e432e968da2d4c949a477.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_f3539ae309044d0ab4f285d3ced22b31.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 5416 bytes
SHA-256: 819860869d2549a3c377c8c9ec7bc0436d4d6780a437414b21199261de8b6901
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off000121b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B6 10740 bytes
SHA-256: 33a655a19713c27e30e068b2d7e597951e4002e97a60b2802949cfc7390dd69e