Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc9683502fbcebe…

MALICIOUS

PDF

80.4 KB Created: 2021-04-07 09:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f2a9070a70476a015639ab8e8874346d SHA-1: 496e8846d09dacd0afccd3c948efc5e0834f2abe SHA-256: cbc9683502fbcebe23c4c3440ac58e6eadf4d37d6f840a2242854f10a335689a
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors, indicating a phishing or scam attempt. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful websites. Although no scripts were extracted, the structure and embedded URLs strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=giantslayer+adventure+path+pdf In PDF document text
    • http://consumer-data-protection-bureau.com/38096788864yu6eu.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/8584214033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_6032a3770951a.pdfIn PDF document text
    • http://usesalle.xyz/645154026909e15q.pdfIn PDF document text
    • http://domainlimax.xyz/english_love_song_ringtone_mp3_downloadiymax.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/zazeve.pdfIn PDF document text
    • http://nasporte1.fun/muvipogxis1l.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/administrative_policies_and_procedures_manual.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/resumen_de_once_minutos_de_paulo_coelho_por_capitulos.pdfIn PDF document text
    • http://skameyki.club/sia_chandelier_sheet_music_pianoqf88s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460251/normal_5fffafed71f75.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/51777673.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/kigodinojutigajer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_885237b5d71d4e3896f333d783446200.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_540a48801eb14adaa7b4ecf28d9bf845.pdf?index=trueIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/putasofikivoloxerufelej.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_391a98004d884d10922980402251807e.pdf?index=trueIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_608b0b6e1e4c4a5d93cab60bd568ba02.pdf?index=trueIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/60223456769.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_e78b0f81d752489085dae971ebf8d907.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_4eb8909eac2342e483412789e8b3dfcc.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 5096 bytes
SHA-256: 4acc280ec5c7c656d0cac02d536419e8217d23614dac1b8e4b434f3c74e27431
font_01_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 10792 bytes
SHA-256: 450cc25571d2961309f0b1cc46eaf98f4422edb2c544af5e2270d48d63e6cb3b
font_02_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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