Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f546d04eaf51173…

MALICIOUS

PDF

70.1 KB Created: 2021-02-27 21:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7cf08d8e61ccbc9ae9ea7aeaf603f213 SHA-1: f717b3ea5dde2180c7f3658e3be126b28a336124 SHA-256: 2f546d04eaf511736502abe71495a58aa8c287ccb83749715766953eecd3398b
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of multiple links suggests an attempt to direct users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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/strik?utm_term=fern%25C3%25A1n+el+crack+jugando+happy+wheels In PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/vosinerazoledo.pdfIn PDF document text
    • https://lowalijadu.weebly.com/uploads/1/3/4/8/134866304/5829938.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/annotation_guidelines_for_middle_school.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/pozula-xotivudu-losoraberexuva-paweji.pdfIn PDF document text
    • https://sabutiwageb.weebly.com/uploads/1/3/5/9/135992853/razadu-butubix-fatovikasoxut.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/4360367.pdfIn PDF document text
    • https://kobejepofefes.weebly.com/uploads/1/3/5/3/135317692/kejabawogovasog-defizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubilegire.epizy.com/40371825046.pdfIn PDF document text
    • http://zotubune.myartsonline.com/fupevu.pdfIn PDF document text
    • http://tomabev.rf.gd/certificate_border_template_for_word.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/nururogirotu.pdfIn PDF document text
    • http://guduxakif.rf.gd/emulator_nes_android_apk.pdfIn PDF document text
    • http://pumukozozuzife.epizy.com/leatherworking_guide_gw2_1-_500.pdfIn PDF document text
    • http://wavujeg.epizy.com/enoch_calendar_pentecost_2020.pdfIn PDF document text
    • http://jusudab.epizy.com/catalogo_hinode_2018_baixar.pdfIn 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_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 5860 bytes
SHA-256: 721975471e3ac94b309558d5771e84a3a83b95a4729670de03c6f209f5007887
font_01_sfnt_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 10124 bytes
SHA-256: e2ed0ddda1719b1e41d6b6b21bbd9c2be3f26a3eebe9e36d95cd72f4e919a74d

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