Malicious PDF — malware analysis report

Static analysis result for SHA-256 1499c5323d63e1e0…

MALICIOUS

PDF

77.4 KB Created: 2021-03-28 16:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d5df7c9d9b3169a10e348569c9f7b4 SHA-1: 53371ad76f4fba9e35780b36134d0ba79fc636b6 SHA-256: 1499c5323d63e1e0ed5e2c7e0f5ce443f7710d2b403abc0c2f44200a858c61c6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

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://gimoguvi.ru/123?utm_term=dilbar+dilbar+song++isaimini PDF link annotation
    • https://sajabewegapin.weebly.com/uploads/1/3/4/5/134592402/wuvorop.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/2834769724.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/8410d62.pdfIn PDF document text
    • http://giocodigital.fun/liwexafajenupomnr8if.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/vitobulegugelanejape.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/actus_tragicus_piano.pdfIn PDF document text
    • http://deflecfcvy.best/mavemorey1wah.pdfIn PDF document text
    • http://nipobudagese.mypressonline.com/accounting_for_managers.pdfIn PDF document text
    • http://bumosid.getenjoyment.net/google_nexus_10_tablet_update.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/bible_history_timeline_chart.pdfIn PDF document text
    • http://meetly.space/6757757717926g8o.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/rufonusomozex.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/1bae4c32-b5f8-47bf-9d15-f43940f22e01/reset_wii_u_gamepad_sticks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd40aa3e-7e06-4c3c-8675-54d2b7778598/jizidizazunenisumukako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d24348-33ce-463b-9201-d80999891b17/falomisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95669eac-4f7a-4530-8421-0513a172956a/wd_live_streaming_media_player_firmware_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e442bcd-1751-4bb7-a003-3e6ffd5bec61/fipujopoluratezafaxatoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983f827c-d85b-4177-8187-ac021769ca3f/howard_gardner_multiple_intelligences_book.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/fisagasa.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/bankers_adda_static_gk.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_off0000ee64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 5284 bytes
SHA-256: 89798ebf44031af14822d3761dd34fdd3900fc586be9bf8a611ed79592fb2400
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 11324 bytes
SHA-256: f705c1e767a3198b8875a764a403e4515ecb0521a0af0febecfb058044e7bffa

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