Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ad67eb5c4872bb…

MALICIOUS

PDF

84.0 KB Created: 2021-04-05 11:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 46b035389558d565abe8745071402aaf SHA-1: ebb1160c78283d2c992a463e3a25ac146be2fdee SHA-256: 51ad67eb5c4872bbbafda09c76dd4b8e6601348b2ae1f3f7eff6292896af3d73
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or phishing lure. The primary URL, 'https://zajinet.ru/strik?utm_term=how+to+change+sodastream+battery', is presented as a search result, likely to trick users into clicking. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://zajinet.ru/strik?utm_term=how+to+change+sodastream+battery PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387922/normal_6021440d7911a.pdfIn PDF document text
    • https://pamesatigifimes.weebly.com/uploads/1/3/4/6/134639420/ec72c2ae02b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_60567299ee46d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_6008f179e332b.pdfIn PDF document text
    • https://tisitijalazog.weebly.com/uploads/1/3/6/0/136017937/xeziruvutorapamuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_601ad2d287443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_60671fbda65d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_603f3968a2a44.pdfIn PDF document text
    • https://luzuredero.weebly.com/uploads/1/3/4/0/134016924/7445159.pdfIn PDF document text
    • https://wejuwano.weebly.com/uploads/1/3/1/1/131163718/aa9179d.pdfIn PDF document text
    • https://semototip.weebly.com/uploads/1/3/5/3/135386148/5159574.pdfIn PDF document text
    • https://wovadipe.weebly.com/uploads/1/3/4/4/134462462/4ba0e68757885ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_60381b1e9e5df.pdfIn PDF document text
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/buxekidabawurogagozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_60260aa2a2734.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/430036.pdfIn PDF document text
    • https://rokaxitifefisol.weebly.com/uploads/1/3/4/0/134040577/kuniwosaguxibuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_606132ff4d61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fd6c5420e6a3.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/60f22a55-1f40-4639-a8d9-c1132471d1b2/80320982290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a49cc4b-1b3b-4de1-bf8b-0101842b0b64/briggs_and_stratton_450_series_148cc_carburettor_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493d7e1b-efee-4292-ac77-9702f0be6488/diferencias_entre_la_constitucion_de_venezuela_1961_y_1999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7445be68-db3b-4a54-8ee4-b3395723e50d/city_of_thieves_adventure_time_full_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad767bf2-cbb2-4f4d-8dc3-208f7c391d19/medical_terminology_a_living_language_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee11474-0e74-4ea1-ae4f-256060a758ec/weight_training_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac83488-5bab-454e-84fe-59205b054953/jopemakivanevinuxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eba0dfe-93e6-462f-a33f-21ae999f3024/51899039205.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_off0001091e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 5616 bytes
SHA-256: c5d458827fb2e22f3c31fd942803a54db35d13b4c512b04af506320d439ab3ea
font_01_sfnt_off00011c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1C 11240 bytes
SHA-256: fe0a280fc2958d1f99150637055b476d3804ef09f4c6b6462743e4ba5b379b04

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