Malicious PDF — malware analysis report

Static analysis result for SHA-256 49defc7dd1272be2…

MALICIOUS

PDF

75.7 KB Created: 2021-03-31 01:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa08c4eb458e1ff33977240d9ba202b SHA-1: a43c7f7061a3059f24fcdf665ee31f23bfc6a2d3 SHA-256: 49defc7dd1272be26817fefae4a7a8491ea3921bd8fe5cc50a09a53d4c14fd6e
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm heuristic, suggesting it's designed to redirect users to potentially harmful sites. The embedded URLs and the document body's reference to 'Bassett furniture crib assembly' point towards a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=bassett+furniture+crib+assembly
    • http://gnoogle.site/vupijwzdnx.pdf
    • https://static.s123-cdn-static.com/uploads/4417645/normal_6006f7351c687.pdf
    • http://help-feedback-amzn8.xyz/905638628735n22n.pdf
    • https://jezipupokegem.weebly.com/uploads/1/3/4/0/134042816/nomidaxipibop.pdf
    • https://cdn-cms.f-static.net/uploads/4454438/normal_605d913236718.pdf
    • https://josozigigararu.weebly.com/uploads/1/3/2/6/132681886/xamonutupovosovituza.pdf
    • https://cdn-cms.f-static.net/uploads/4488317/normal_6026ebb9570b1.pdf
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5ff7b837612cf.pdf
    • http://infonewsuk.site/pizefuvwn5w.pdf
    • http://creditchecktotal.info/fofederagupajupu1fsr.pdf
    • http://gaydating.world/spacex_starlink_ipo_datefbsmk.pdf
    • https://cdn-cms.f-static.net/uploads/4408462/normal_605a043a345d9.pdf
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/594083.pdf
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/sigowej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2249c512-4e5d-4d99-9b7b-97e838e6477f/kekiwidorurijaz.pdf
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_d19cf33f0d94407ebe28ce6a173c51ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/51f9426b-f648-42c0-9fd1-3668291c66ac/zojotegezanebuveg.pdf
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_c2d57ef3817843a79e3979ad25cb1559.pdf?index=true
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_bd6dc6692dff4b5eac73a63b1106f195.pdf?index=true
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_5b8aea210e854303bab1ff4872478a46.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e74e16c9-3c34-4800-9b4d-5c44cb047246/2637245330.pdf
    • https://uploads.strikinglycdn.com/files/0c5d61e0-fba3-46d8-89bb-2ab02ccf47d9/60944425726.pdf
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_350cee1e5cb74b09b098362b8999def4.pdf?index=true
    • 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_off0000e8cb.bin
04d0c27d2035339263c6e743de6a8e3c689c4a36ca715e74bfba1e1268156e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 5316 bytes
font_01_sfnt_off0000fad7.bin
3cd2ce1cdffab2f9c63dbdbf66eb3e127965058b251a083722080e43177f94fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 10808 bytes

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