Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba8e95998894ed5…

MALICIOUS

PDF

85.2 KB Created: 2021-04-22 11:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8b009c1a760b5ebfdb7922778bead07d SHA-1: 6f707fcb2fbf5c647548115d8c0fe58ac91e67cb SHA-256: aba8e95998894ed5a3560870dffd846dfbe0e93419a857009ffcb61076789912
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with the primary one being `https://seumenha.ru/strik?utm_term=what+are+some+side+dishes+for+thanksgiving+dinner`. This URL, combined with the PDF's structure and ClamAV detection as `Pdf.Phishing.Trojan`, strongly suggests a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to Thanksgiving dinner side dishes, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=what+are+some+side+dishes+for+thanksgiving+dinner PDF link annotation
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/0de5ee379dfd.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/narasimha_kavacham_telugu_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_606795657222c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_604242f790240.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/dosixe.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/netgear_nighthawk_ac2100_vs_ac2600.pdfIn PDF document text
    • https://bigubiforuse.weebly.com/uploads/1/3/5/3/135389938/5ed13a15048e4a.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/critical_criminology_theory.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/27479ba0.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/7th_grade_math_test_prep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424349/normal_603a057927b87.pdfIn PDF document text
    • http://wefitibugajax.iblogger.org/mevukeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_605b8fa617f02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zodiripek.myartsonline.com/lujirufizamupuwelamebilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66de6b24-3c3f-4412-acae-da6609302e04/napefiperumumojixafuna.pdfIn PDF document text
    • http://xixoxamevat.epizy.com/jidekutiximoruvuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffaa478-1e7b-49cf-9954-6b9aeb01e0df/how_much_weight_can_a_jeep_cherokee_tow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b13076-9ebb-4a47-8aa5-68151cba2b10/kununoreroxav.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/what_is_the_last_keeper_of_the_lost_cities_book.pdfIn PDF document text
    • http://neloralo.myartsonline.com/meningitis_bacteriana_tratamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa39528-18f2-4d7d-bf4c-4894a54fb643/57972643448.pdfIn PDF document text
    • http://mevafefulasi.rf.gd/busizigapelil.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_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 5428 bytes
SHA-256: 3f01961788ef1b5da80ec5736ce17a48c5dc3616cb6a64676379e81de44388de
font_01_sfnt_off0001214b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214B 11100 bytes
SHA-256: ebd812a16463d6ecef8630c10fbab82067ca1d6ac6b0d82b27baa88f3a082b41