Malicious PDF — malware analysis report

Static analysis result for SHA-256 057b55dfa2304a7d…

MALICIOUS

PDF

77.0 KB Created: 2021-03-27 19:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cc7a677aed08a94a05c634cddf526569 SHA-1: 4eea2e9691b2a30058a5d86643ad242ecec83a68 SHA-256: 057b55dfa2304a7dbb963d6937cb78077a9d4a4f628380ec9c63939f528d814c
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain text related to a technical issue ('garage door opener keypad not working'), suggesting a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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/strik?utm_term=garage+door+opener+keypad+not+working+in+cold+weather PDF link annotation
    • http://masito.space/15196404909ew5l.pdfIn PDF document text
    • https://cdn.sqhk.co/gufulixofoma/nmjj2jg/franklin_and_marshall_football_conference.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/bible_history_telugu.pdfIn PDF document text
    • http://easterthjg.com/bugonuvuzumekaxestm34.pdfIn PDF document text
    • http://shoppermarket.online/numaxubuvipexilutufoga5p5vu.pdfIn PDF document text
    • http://tryse.xyz/kavoxilipoponidefijafisowt168.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzukada/hehddge/coloring_animals_pixel_art_game_free.pdfIn PDF document text
    • http://sutezesibopixiv.medianewsonline.com/82436650950.pdfIn PDF document text
    • http://soinjaga.ru/craftsman_7_hp_17_rear_tine_tiller_manual14xmn.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/hjcVthc/tugovukerujetag.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/hghaaHP/rixozesenozegapuwututuwi.pdfIn PDF document text
    • http://romeoplanet.club/63110746087tl6r0.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/genetics_notes_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/iMjaIYQ/lalopomojexifozif.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/pogelenajenizosupuk.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/bb9787cc-d6ee-4c52-b76d-af20a450e8f3/zowanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a612a6-6cdf-443b-9472-e3232bd00f0d/jig_pole_fishing_for_crappie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50689b0d-e31f-46c2-b899-f779058cbaa5/descargar_ana_gabriel_huelo_a_soledad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0026de24-49f6-4805-bbab-4ef6e6254cd0/takemawobenixifipiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10c25ce-bc41-45f1-b72b-30345de8d3e7/first_alert_model_sc9120b_replacement.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 5444 bytes
SHA-256: fcf603723bf1c6634d3d81be7d4ac46b509c851151da15b9011e97abd0d0ca2b
font_02_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 10700 bytes
SHA-256: a8aa0775cd00f7afbb66955072d3280609e2dd2f09fd864646fde61b0e691205

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