Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f11f47cdb847f5e…

MALICIOUS

PDF

86.8 KB Created: 2021-04-06 14:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e4ea7762e969ab0d83c0b7997284c4c6 SHA-1: c443419e8bb36d03525608c49f6aa1509042c1f4 SHA-256: 5f11f47cdb847f5e29e83aa1ece33ba6e8533dee0e493222db60b21e9ca9dd63
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, one of which is associated with a phishing lure. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

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://resalured.ru/strik?utm_term=breville+je98xl+juice+fountain+plus+850-watt+juice+extractor+costco PDF link annotation
    • https://cdn.sqhk.co/fofateze/iheRsRG/versace_chain_reaction_black_on_feet.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/evuhbjh/arctic_wolf_habitat_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60111ea72b455.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/d1uhjge/93193732330.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/hjevCEC/samurai_flash_hack_appvn.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/sU3hd8X/niwawekavilowafejutigonid.pdfIn PDF document text
    • http://movoxazukum.22web.org/29642268877.pdfIn PDF document text
    • http://xilubibe.iblogger.org/lamofanadebakunazawezu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369659/normal_5fe20924a43b1.pdfIn PDF document text
    • http://sesaxojatox.iblogger.org/australia_visitor_visa_form.pdfIn PDF document text
    • http://jitutirujemi.22web.org/mivadilejoki.pdfIn PDF document text
    • http://nuvuzujujafusu.22web.org/project_director_job_description_template.pdfIn PDF document text
    • http://nanavunitub.iblogger.org/mumal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidaxapotemi.rf.gd/english_comic_story_free_download.pdfIn PDF document text
    • http://rejekokamikax.rf.gd/21375406299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222e490f-484f-465a-826e-b6869def7749/how_many_words_does_the_average_24_month_old_know.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dbee50-3614-4328-bbd1-bbbb5461d173/what_gas_mileage_does_a_5.7_hemi_get.pdfIn PDF document text
    • http://noboxiroxe.epizy.com/jenubupikore.pdfIn PDF document text
    • http://meluxowuxepos.rf.gd/black_panther_movie_font_free.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_off000111af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AF 6004 bytes
SHA-256: 56293c9f8d8866352ed63636eeb3deb1aa7a26338ef75a078149fe0e0896dac1
font_01_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 11452 bytes
SHA-256: 46c0de56c450e9c29b88e6405c1ec212e42afb79c2aa23fb3e3d36e1b81ca65e

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