Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ff54560c81ba1c…

MALICIOUS

PDF

88.6 KB Created: 2021-03-25 14:58:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 375cda6acb8b2b2598633485605c35bc SHA-1: ed563aa0ac205367f9428b864621bde2ad1253d1 SHA-256: 05ff54560c81ba1c4d16aa6f6e75f4f875c8e611e08fa8d6be7ff0fea593b413
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, with one prominent URL suggesting a download for a 'nitro word to pdf converter software free download'. The presence of many links on disposable hosting and the use of UTM parameters further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=nitro+word+to+pdf+converter+software+free+download PDF link annotation
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/jilizif_ragokibesa_dubexusi_fedukebav.pdfIn PDF document text
    • http://moreprodukti.com/what_i_love_about_you_book_answer_ideas524wk.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/rowivilururebifemu.pdfIn PDF document text
    • http://knitfqph.site/tosewep4ewsy.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/3662766.pdfIn PDF document text
    • http://unityfree.xyz/siem_reap_cambodia_food_guide2h15t.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/historical_approach_to_literature.pdfIn PDF document text
    • http://goproits.com/59152636418xhuyx.pdfIn PDF document text
    • http://copyright-central-media.com/new_3d_games_apkyufol.pdfIn PDF document text
    • http://vk-settings-change.online/sodastream_cylinder_exchange_targett1baw.pdfIn PDF document text
    • http://fit-italy.space/lowixawalegepodojosibua87.pdfIn PDF document text
    • http://getplafond.xyz/89585593348i83hn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widepidaba.atwebpages.com/65632274174.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/42409308290.pdfIn PDF document text
    • http://tediguku.atwebpages.com/corsair_k95_gaming_keyboard_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8e6307-5ce1-4a3c-8953-c243ab5606ec/leah_on_the_offbeat_quotes.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/how_to_set_a_honeywell_thermostat_on_auto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3400f9f2-a9d8-4d83-b401-39830806483e/has_discovery_of_witches_been_cancelled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ac0da4-28a1-408c-aa52-9ebba352edb8/is_it_better_to_do_low_carb_or_keto.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/4825805005.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 5272 bytes
SHA-256: fa5f7da83252bd7247c257b927b4535ea648df364cedb86a513cebc144b628ee
font_01_sfnt_off00012e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E14 11188 bytes
SHA-256: 2ae660b82f4e0c07800f5f9ca95c5f39c645e03e20b7556b4fed462ec65c92ba

Open this report in the interactive analyzer, or submit your own file for analysis.