Malicious PDF — malware analysis report

Static analysis result for SHA-256 8026339c53b97d80…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 22:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 016a8f8c9e84bdbf3604f656adf74b58 SHA-1: 4ddedb96c28a3c66451502ddabaa67f7a8a4b73c SHA-256: 8026339c53b97d8089e1311d155f5e923c1ab724d5e4bff53c9705e5bd38468f
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 large number of external links, many pointing to disposable domains, characteristic of SEO spam or phishing campaigns. The presence of external URIs and link farms suggests an attempt to redirect users to potentially harmful content or gather information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=ohioguidestone+intake+number PDF link annotation
    • http://italywom.space/34243820055jdj02.pdfIn PDF document text
    • http://bilkaita.space/96466853769lsrah.pdfIn PDF document text
    • http://arbitestpark.xyz/engal_anna_tamil_movie_audio_songssvdk2.pdfIn PDF document text
    • http://frankiearvelo.com/xupowdz7ao.pdfIn PDF document text
    • http://nubolutlion.xyz/what_ink_does_epson_xp_320_usewv8cu.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/8c134c634.pdfIn PDF document text
    • http://igonlinesupport.com/genetics_from_genes_to_genomes_2nd_edition5edga.pdfIn PDF document text
    • http://jumpfs.space/what_is_a_free_verse_in_literaturefltin.pdfIn PDF document text
    • http://copyright-rules-help.com/5927345360oun88.pdfIn PDF document text
    • http://hairsprof.ru/zoxetege4fm60.pdfIn PDF document text
    • http://qwert-ita.fun/patterns_of_enterprise_application_architecturednst1.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/sutidebirubuw_nipadewuvukof_zijadogetipu.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/2436577.pdfIn PDF document text
    • https://linefalaxig.weebly.com/uploads/1/3/2/6/132682404/vawukobet-gapujik-tukuf-pagisake.pdfIn PDF document text
    • http://sokolov.fun/100_pounds_to_dollars_in_19307tvgd.pdfIn PDF document text
    • http://my-favshope.online/2x2_oll_pll_algorithmspsqrt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_1aed8ba5d0804d0da2514b5033e4fc04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7bb845-2310-4e56-9e04-86f9ef04fd0b/sharp_alarm_clock_manual_walmart.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_ae83377299de4342928adb757382dd99.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab6d378-169b-49eb-b8af-81ea032c9015/92356598035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698ceb6e-dc6a-486c-8b6e-f6a0a5c8d1a6/more_than_you_meaning_in_hindi.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_301a243c856a4d80ac9317ecaf8371ed.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_816438298e34453aa3dafc49ef402fb6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 5436 bytes
SHA-256: e5564794496c04389d6aa338aebc12dbbb8cc3e245490dc4517cc154d671c7b1
font_01_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 10852 bytes
SHA-256: 423d938fcf7495cc76eab306792466666f6e9e297fb775a96a3bbf1a0e985131