Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9d4ba4405d6d75…

MALICIOUS

PDF

90.9 KB Created: 2021-03-17 00:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d8f571b32fd391b3e0bf02fc044b76 SHA-1: b094a3558d2dea60ff066006b652f60e55559d0b SHA-256: ed9d4ba4405d6d75bad613d7a85f8cacb7e5d94b41de28a930f9b34226e09f25
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('jumiwimov.ru') that is likely used to host a phishing page or download further malware. The document body, though partially corrupted, suggests a lure related to wedding attire.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=what+to+wear+to+a+spring+afternoon+wedding
    • http://erogan24.website/919610049834190a.pdf
    • http://geosen.net/how_to_replace_battery_in_golf_buddy_wt3z4ezt.pdf
    • http://mini-cam-v2.club/56196037676h6vv5.pdf
    • http://henrysavbr.site/possessivpronomen_bungen_b2j8wzy.pdf
    • http://domavera.ru/roland_td4kx2_price8cfn5.pdf
    • http://devgame.design/carols_of_the_bells_freesrtlb.pdf
    • http://vifubavawet.mygamesonline.org/93765483172.pdf
    • http://brumbum2.xyz/how_to_find_binomial_probability_distribution_on_ti-84_plusrt759.pdf
    • http://nuzarekuzugav.mypressonline.com/26352094146.pdf
    • http://premiumpornclips.com/mimenetabufavikev7dlaa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c1b247848bde4598b4ae2aa4fdf2afe9.pdf?index=true
    • http://sogivuwe.onlinewebshop.net/5237306308.pdf
    • https://uploads.strikinglycdn.com/files/187eba98-ad62-4358-950f-1ddb9b081ff9/precision_sewing_machine_vintage.pdf
    • https://uploads.strikinglycdn.com/files/69951166-470b-47bd-88ef-cbd081f72b3e/the_sea_of_monsters_summary_book.pdf
    • https://s3.amazonaws.com/vipuxafol/98257672883.pdf
    • https://uploads.strikinglycdn.com/files/ce35da4d-1610-43d2-bce6-42da6db1c983/how_to_control_anger_in_islam.pdf
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_28a294f8268d407983528b52e986be58.pdf?index=true
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_7fe92b884c134752b95f6df341548344.pdf?index=true
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_ba7a6e41d8c54f13a5d842a872ce3e3c.pdf?index=true
    • https://s3.amazonaws.com/marimejerebo/template_calendar_2019_malaysia.pdf
    • https://s3.amazonaws.com/lewuli/forelesugigeraserafa.pdf
    • https://uploads.strikinglycdn.com/files/a2e84429-7b6c-4053-ae7e-2845b496f07c/gamasisuwagorutexegepa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001243c.bin
c2775651d68c91aec7d464d8981f5f34d148e1d6d1fa8e6a48e9207869b8ab1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1243C 5376 bytes
font_01_sfnt_off0001369e.bin
6b2342b3af6ecb05ade602d0804d9dd2a5eb913bacacd58afa8dd42e8c418d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1369E 11564 bytes

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