Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eb896485618367…

MALICIOUS

PDF

86.6 KB Created: 2021-03-24 17:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e448a4a15079938ef02c422c9afc4687 SHA-1: 8531e0bff4c015cb015849ff525326fea0fa99f9 SHA-256: 74eb896485618367532a5b42c064132e1a4af671b6f2a7bf6bd77183b8b57d3f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

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://zajinet.ru/strik?utm_term=where+to+get+free+food+on+your+birthday+uk PDF link annotation
    • https://mosazojuwuz.weebly.com/uploads/1/3/4/6/134669347/560aa5f4e1d76.pdfIn PDF document text
    • http://kepekusajox.iblogger.org/bmw_ag_balance_sheet.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/jazexukok-jemitedizu-sejig-xobijijufum.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/dunikurirojot.pdfIn PDF document text
    • https://veranaza.weebly.com/uploads/1/3/4/6/134665567/e24a8229bc.pdfIn PDF document text
    • http://7lessons.site/65865282477mqugn.pdfIn PDF document text
    • http://thechambre.xyz/awdhesh_premi_bhojpuri_song_2018_newlyf2l.pdfIn PDF document text
    • http://vwwv-avito.online/michael_r_solomon_consumer_behavior2j4n9.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/enzymes_worksheet_boardworks_ltd_2014tv6t.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/de56a41e.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/mexurebefofo-mijexolazavog-gonuvapaj.pdfIn PDF document text
    • http://car-den.ru/how_many_carbs_are_in_a_caramel_latte1jy6u.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/wazeneronojijifesakiv.pdfIn PDF document text
    • http://wokokijup.iblogger.org/woxunevibotatidurobogovu.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/zamonekogepeviwafub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5777fa-6306-46df-bb9e-e95d8dd86411/what_is_a_gerudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbee934-d6ad-40ae-aaa9-f9a45753597e/52698104830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3730e21-2ce1-4cf4-a9ad-3a7ac6614fea/rich_are_getting_richer_and_poor_are_getting_poorer_ielts_essay.pdfIn PDF document text
    • http://kawetagomududu.rf.gd/why_is_spectrum_internet_not_connecting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2f12c6-11ae-4f1c-a12b-f6aa8dcbcb76/the_hobbit_3_tamil_dubbed_movie_download_isaimini.pdfIn PDF document text
    • http://vowaderisosalel.epizy.com/dakofogemefedabakabom.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 5276 bytes
SHA-256: d728f0b2d5e9ec9f57eb4fa4d06662f0de6a38c1f63e437e680e820f0b04a78e
font_02_sfnt_off000126d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D7 11148 bytes
SHA-256: f9634c5b9ce7cba080084cb9554dabc67e7388172e60729aa2ad0c4d68ff55e1