Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b49c84d1f443f18…

MALICIOUS

PDF

92.1 KB Created: 2021-05-18 06:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a51000cf0c634b75e1f0f94d54f61b0 SHA-1: b7f1f471fdc3f0b7fdb6839548d75de4e3fc27b0 SHA-256: 7b49c84d1f443f188d9d1dc28d51738a3b127d87eea002b0f1a132b2a81c08f9
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent URL pointing to a suspicious domain related to a Dyson vacuum cleaner. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=dyson+ball+dc25+vacuum+brush+not+spinning
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/573247.pdf
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/fasenaka_nutalivezulama.pdf
    • https://gidupewurugi.weebly.com/uploads/1/3/1/6/131637306/567786.pdf
    • https://static.s123-cdn-static.com/uploads/4501509/normal_5fcb383717526.pdf
    • https://cdn-cms.f-static.net/uploads/4409420/normal_605b3fadbfa1a.pdf
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/kuxojuwewuxipixal.pdf
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/kubemasilapetigita.pdf
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/8678549.pdf
    • https://fojomuku.weebly.com/uploads/1/3/4/4/134447263/nujajekimev-vofowulakerif.pdf
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5fc98f4019ea1.pdf
    • https://static.s123-cdn-static.com/uploads/4459481/normal_5ff172d231186.pdf
    • https://tatisosef.weebly.com/uploads/1/3/5/3/135333589/1040a36c34d.pdf
    • http://kekemubitaf.iblogger.org/manual_de_usuario_bmw_x3_2019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loneminovu/diadora_n9000_size_guide.pdf
    • https://uploads.strikinglycdn.com/files/94cecff3-cf60-4312-ac43-b1913a016b53/nefukonufuluxirivekoputif.pdf
    • http://vakakumiwizexoj.epizy.com/waraxoforelolozutipu.pdf
    • https://uploads.strikinglycdn.com/files/fd64125f-38d9-49bf-9d2d-8a586154e7b9/pebiragij.pdf
    • http://kofupugixujodin.epizy.com/89745274143.pdf
    • http://lojupefiduk.epizy.com/kokezasomupobotize.pdf
    • https://s3.amazonaws.com/pewibim/88684249672.pdf
    • https://s3.amazonaws.com/mipizaju/air_force_enlisted_ranks_quizlet.pdf
    • https://s3.amazonaws.com/rogugagatuf/47966465843.pdf
    • https://uploads.strikinglycdn.com/files/968e368f-ca1e-489e-82e3-15a7210c61c0/pete_the_cat_buttons_board_game.pdf
    • https://s3.amazonaws.com/sinamozagemoger/passat_b6_2.0_fsi_engine_code.pdf
    • http://vexowiwoputam.rf.gd/gospel_choir_performances_london.pdf
    • https://uploads.strikinglycdn.com/files/2276bade-de26-4179-8655-5ece71a3bc46/gusinetexololiki.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_off00012217.bin
7c058806e8461bdde1e9120ef4fd1e35fa195dbbf4fc426c3b8d86cebe0580b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12217 6044 bytes
font_01_sfnt_off00013691.bin
a46395e5ea6862ca8f7c2dda4a9db137143941978f316bde21e572160835311d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13691 12440 bytes

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