Malicious PDF — malware analysis report

Static analysis result for SHA-256 c797d45594877a17…

MALICIOUS

PDF

81.7 KB Created: 2021-03-30 03:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c648147ef2377eb403c40c3b6fab7e8 SHA-1: 21447235ebae5f80dc1b16cb7b6cca9b71f07194 SHA-256: c797d45594877a17cf3905230f048e30e763b9096ee4de57f8c0963e1374cd98
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical detection for an advance-fee scam lure. It contains a mass of external links, with one primary URL pointing to a suspicious domain. The document's structure and content strongly suggest it is part of an advance-fee fraud scheme, likely aiming to trick users into paying fees for non-existent prizes or parcels. The presence of numerous external links, many pointing to benign content, suggests a link-farming or SEO-poisoning tactic to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/wix?keyword=properties+of+waves+worksheet+key
    • http://zotikarida.medianewsonline.com/68762803390.pdf
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/1388767.pdf
    • http://lazujifoxupa.getenjoyment.net/domiraxe.pdf
    • https://ranedesipa.weebly.com/uploads/1/3/1/3/131398497/vedodafefe.pdf
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/tanubot-sepaguk-luwudatadora.pdf
    • http://gajonedorebuko.mywebcommunity.org/swing_trading_ebook.pdf
    • http://pesowulil.iblogger.org/mary_balogh_descargar.pdf
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/549e7f2963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/viboxikuz/is_mustang_ecoboost_better_than_v6.pdf
    • https://s3.amazonaws.com/mupukesunobaga/67206369431.pdf
    • https://s3.amazonaws.com/bubeto/wadapujikovaxekukemuraju.pdf
    • https://uploads.strikinglycdn.com/files/a5a93125-25f9-4c71-833f-24255929ebb2/death_note_characters_l_name.pdf
    • https://uploads.strikinglycdn.com/files/9c330500-c31f-4591-b761-24e58eac84e4/84326317580.pdf
    • https://s3.amazonaws.com/timituvupame/which_version_control_is_best.pdf
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_c5535b4abab242c58bec57cc8556be4a.pdf?index=true
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_5baa96b821934991b8a8cd6a5ff101f0.pdf?index=true
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_815598aba9db4465a1102ba2631d0954.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58c05355-62b7-4ec6-bf80-7e6628c0166a/dexaf.pdf
    • http://tikikenuf.epizy.com/browser_video_hd.pdf
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_7d21fa699362485690e7b0ac9b04dcb5.pdf?index=true
    • http://rebukupomapet.rf.gd/37273461770.pdf
    • http://zibelasavu.atwebpages.com/fokuwogurerasobe.pdf
    • https://s3.amazonaws.com/xulepiwa/murowa.pdf
    • https://uploads.strikinglycdn.com/files/cb6b1e2b-87ef-4c71-bf50-eb639b041e7e/what_is_the_nature_of_inductive_reasoning_in_psychology.pdf
    • http://pokowowusi.rf.gd/93668116752.pdf
    • https://uploads.strikinglycdn.com/files/e1eb3f81-919f-42d8-8654-6189e6d9fca4/karij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ec.bin
eb41562c5b1db6e4ee84ea6e30ad33ba3db16a42c11e5f4fede2a7e42f9833d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 4956 bytes
font_01_sfnt_off000104f2.bin
50eadaebcc17e1cf4d845fef75391fd35581d2365d5281528e361dfd78533dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F2 11072 bytes
font_02_sfnt_off00012a9d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9D 4324 bytes

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