Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14ff0a81ffe39f6…

MALICIOUS

PDF

76.3 KB Created: 2021-02-15 22:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a81549d37035be2da76b4f365170d120 SHA-1: ddf9f347bd7b0a8aa7a479782b81df5a5091e0ab SHA-256: a14ff0a81ffe39f68c27f87be3bb1fd52faa044c5e9c1842f913f1768a4bd062
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector designed to lead users to potentially harmful content, likely a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=how+to+trade+stocks+before+market+opens In PDF document text
    • http://discout.online/matthew_hussey_ex_back8fpdu.pdfIn PDF document text
    • http://trysoda.pro/22637732125353mq.pdfIn PDF document text
    • http://naturmilans.fun/xogetifamuwolebeyl1dh.pdfIn PDF document text
    • http://inostrana.com/angry_birds_2_full_hd_movieah45k.pdfIn PDF document text
    • https://kanodofeju.weebly.com/uploads/1/3/5/3/135325650/gikolore-miboji-tejadapa-betarit.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/561043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_600b6b2f7396c.pdfIn PDF document text
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/20ef8daa1f8b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_6021d266c64ae.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/keroloxazipezak-saxinukezeluden-juxepe.pdfIn PDF document text
    • https://movimuwetimegi.weebly.com/uploads/1/3/4/3/134342740/8872133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/wagikuwononizujupalo.pdfIn PDF document text
    • http://vokerajud.epizy.com/duxozamemagijowa.pdfIn PDF document text
    • http://borosiker.rf.gd/game_aquarium_fish_mod_apk.pdfIn PDF document text
    • http://sobuzazan.rf.gd/fewul.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bang_bang_movie_telugu.pdfIn PDF document text
    • http://tupudenijusab.rf.gd/26805911568.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 5524 bytes
SHA-256: 73ea948c66f38b26028bca6f7365ec00fe5efc07c078ab15fbbdc385b0a58ca1
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 11532 bytes
SHA-256: 753b6bdf803a599a932a0edbdfbd5972f20a5baaf2ddd70d58ff2a21d6a1e3ef

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