Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b7132bab87b3e4…

MALICIOUS

PDF

97.6 KB Created: 2021-04-27 03:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e51baa32ce64f04140128a37eb9bbfe6 SHA-1: 197b149529b10495ff12db6ca870ca23469252a1 SHA-256: 92b7132bab87b3e49e98ae83887485b5b2b3a165c365802c2998c1ce3223438c
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 0.9998

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://fokemale.ru/strik?utm_term=phon+root+words+definition PDF link annotation
    • http://mmamba.ru/arcade_archives_donkey_kong_3_switch7xp0v.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/YrjeNH7/45288279648.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/Wic1ijA/top_hits_2019_playlist_rap.pdfIn PDF document text
    • http://shoop-fr.ru/vixotokoxefotiwelusevug1qnz9.pdfIn PDF document text
    • http://daravto18.ru/29320534337g233y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_6711c1d096a04d76ac741de767830c80.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_2064432dd2484328a08aca7b9ffc84b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vapite/what_to_do_if_my_kindle_fire_wont_turn_on.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_94bb8e69801a45f9877f170c3b68c24d.pdf?index=trueIn PDF document text
    • http://teropisarazo.myartsonline.com/lozuligavax.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_20d7c6941dfa4e7090a1bea8ddec1de2.pdf?index=trueIn PDF document text
    • http://lafagelupuf.myartsonline.com/analytical_chemistry_by_gd_christian_6th_edition.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/el_genitivo_sajon_en_ingles_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/gepowixisokesoxoveronogej.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_f1f3bd0d23a44aa1aa42053fba9bf258.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/96319631498.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/tim_ferriss_books_most_gifted.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_1a3c8c18c73443689c36911fc2354c20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/petsafe_wireless_fence_not_beeping.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5F 4848 bytes
SHA-256: bd781a06d687b0186d1d17110bc68b6a235e67719528554036d0cdd2592d1ac3
font_01_sfnt_off00014ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE8 12736 bytes
SHA-256: 1bd468f8f84807e837fce075bacdab7dd8ce159b5d94e1d89b707ebcff4450d0

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