Malicious PDF — malware analysis report

Static analysis result for SHA-256 e103250b6897608d…

MALICIOUS

PDF

77.3 KB Created: 2021-04-11 03:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c1ddd39901d8175fcb2869de12327b63 SHA-1: 2cb5dd5e2b63378604e2a10b54bcb0f68c313bca SHA-256: e103250b6897608da1fd7f37439fc88a385c3f96527cb8660b77e6e365ad1de3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to common search queries, designed to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=how+do+you+reset+the+temperature+on+a+samsung+fridge+freezer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369651/normal_600cf1a0ac3a0.pdfIn PDF document text
    • http://golitibixodeku.iblogger.org/96884228223.pdfIn PDF document text
    • http://randname.ru/87190719604xlz6y.pdfIn PDF document text
    • http://slimitalia.space/8988767761481la9.pdfIn PDF document text
    • https://letobepep.weebly.com/uploads/1/3/0/7/130740206/7603952.pdfIn PDF document text
    • http://mishabelle.ru/sesapasadvkocj.pdfIn PDF document text
    • http://lefijuf.iblogger.org/11919787957.pdfIn PDF document text
    • http://dixixamada.iblogger.org/puisard_fosse_septique.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/meningitis_encephalitis.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdfIn PDF document text
    • https://foxevavudutis.weebly.com/uploads/1/3/4/3/134380199/tubobiwapemafuvitoki.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/isomerism_iit_jee_questions.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/jagetego.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/morofepo_fojuzox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_60476d9142792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_603ea06744eea.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lalowarereguwel.epizy.com/55208976624.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/kofugajun.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_5ed7ab73a024477ca0c979d0d9454087.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/what_do_the_letters_mean_in_the_16_personality_test.pdfIn PDF document text
    • https://84bc2af4-305a-40b7-847c-8c52cb6b08d2.filesusr.com/ugd/a2e525_8d47bf05d13a4e4fbcc59a16ea629bd4.pdf?index=trueIn PDF document text
    • http://didopip.epizy.com/administracion_de_medicamentos_via_subcutanea_objetivo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 5628 bytes
SHA-256: 6f7bdc412c0f7481fd046732885d993988ffc23a55c301b377845475c06b01ea
font_01_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 10836 bytes
SHA-256: 29ed1cb9e17d918bbd1f560f93d85c25512149f423daa9938cb16d7e8e62fc54

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