Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db8c0868671fd9d…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 14:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 901a757a9ac024a4a378bea899b3b64b SHA-1: a03c11f97d0059f058ec058ea522cf47341e00f9 SHA-256: 0db8c0868671fd9d518c10d6a835212000e33a0be20de9c09bbdeb5296309138
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, contains a question about boxing, likely a lure to entice users to click on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/strik?utm_term=is+26+too+old+to+start+boxing PDF link annotation
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/f61f3bb3.pdfIn PDF document text
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/nazafudelose_jijoze_tesapoze_naxom.pdfIn PDF document text
    • https://lomagifotoji.weebly.com/uploads/1/3/0/8/130814873/b121300141.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/14916105563.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/2FzADid/jozipalidosejofijezunu.pdfIn PDF document text
    • https://nuranisemamev.weebly.com/uploads/1/3/5/3/135324344/5633995.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/when_was_the_kitchenaid_mixer_made.pdfIn PDF document text
    • https://zitasiga.weebly.com/uploads/1/3/6/0/136088478/17fb916704bc32b.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/sixonozi_kukonimabig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_60367f86f0476.pdfIn PDF document text
    • https://cdn.sqhk.co/xurokagozagu/g8MtPYG/ni_crio-_9074_datasheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_604e15313767c.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/d6d6cd01e14d.pdfIn PDF document text
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/1b8f117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_60092739a2ef1.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/49b68.pdfIn PDF document text
    • https://lonegaru.weebly.com/uploads/1/3/0/9/130969637/5b9919c9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giworutiw.myartsonline.com/interview_with_the_vampire_series_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f97fd8-4270-436c-8edd-0912427bf5c0/social_psychology_definition_by_different_psychologists.pdfIn PDF document text
    • http://titugol.atwebpages.com/navy_medical_corps_incentive_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e9ed7c-e796-4cbc-8e15-015313a66f08/sword_art_online_light_novel_13.pdfIn PDF document text
    • http://tumobuwixakeg.atwebpages.com/35625292174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ccaca8-6978-429a-9ac2-fe0fc693e3c0/nenapebarurajadin.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_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 5424 bytes
SHA-256: 55cee79fce324e38e34f63ada170215484805933bed32e25fe34e93e43b13178
font_01_sfnt_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 11236 bytes
SHA-256: 05715985820cb954f122f9401b3517498e92b8c071add876b4406fa22eb759a8