Malicious PDF — malware analysis report

Static analysis result for SHA-256 6654bd0a9b8d3fcb…

MALICIOUS

PDF

84.4 KB Created: 2021-03-17 21:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 51b8eeec379d871e05981172af75f3fa SHA-1: 53533c2140823449011ad7a87610988a4f9309f9 SHA-256: 6654bd0a9b8d3fcb9cdc572c5232c9ba191121272872104a2cdda5d6eccb56e7
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 0.9970

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/wix?keyword=verizon+lg+phone+manual PDF link annotation
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/kivavesexe-zorefetiga-xibusiv-magolubokidesod.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/rifheMk/buzzing_tech_news_trending_videos_on_youtube.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/872e0200d636a4.pdfIn PDF document text
    • https://sewenafefu.weebly.com/uploads/1/3/4/0/134012434/rirupu.pdfIn PDF document text
    • http://saburogamo.iblogger.org/7311078003.pdfIn PDF document text
    • http://abreudesigns.com/biragavezolaxiwzs35d.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bgcjij7/96085703992.pdfIn PDF document text
    • http://trydouche.xyz/sebalufunedatiwilewulebsc77.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/ihdqvmm/53928448218.pdfIn PDF document text
    • http://fb-copyright-help-from.com/artflow_paint_draw_sketchbook4c8m9.pdfIn PDF document text
    • http://pro-gram.pro/sobevaxutakapirofutyfmm1.pdfIn PDF document text
    • https://fijoxivivuf.weebly.com/uploads/1/3/4/0/134041864/sepozo.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/4jRJYhb/degokejoj.pdfIn PDF document text
    • http://montana-media.com/android_studio_jdk_directory6iwlx.pdfIn PDF document text
    • https://zenojunaguj.weebly.com/uploads/1/3/4/6/134668508/pepudewosenofek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutaxinasiva.epizy.com/comdial_phone_label_template.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_38d80bf39272492d82faf79cb880fa5a.pdf?index=trueIn PDF document text
    • http://gogujigasad.onlinewebshop.net/the_spectacular_now_full_movie_online_123movies.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_05afc6871b334bbaab4573bdfdadb194.pdf?index=trueIn PDF document text
    • http://gopogawamo.rf.gd/amplificadores_de_potencia_clase_a_b_y_c.pdfIn PDF document text
    • http://rurejotalovulu.rf.gd/xukigevavedudivadoba.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_98075ae6b93a432f8f48b3c26dc001d6.pdf?index=trueIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_fd4e9a143aa94f819db1d27026d8bf3d.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_f9fcc1b4e9a74967b93dbb5876d03ab8.pdf?index=trueIn PDF document text
    • http://xedemigu.atwebpages.com/62375941754.pdfIn PDF document text
    • http://daporev.epizy.com/irritable_bowel_syndrome_2020.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_off00010c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C11 5072 bytes
SHA-256: ed4eb4a16fec7d7e729ae1978164e5c9616110585c037d705c2e613a5bb96a49
font_01_sfnt_off00011d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 11408 bytes
SHA-256: a15879fbb852f8621e04b09574423a2e410da4c5ce043a81378ac342cbab88a8