Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b720966d29b440…

MALICIOUS

PDF

85.1 KB Created: 2021-04-15 12:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8b1baf8b8bd583df807792daeec79672 SHA-1: e97f4f9ad9c96d8937577c9b784113eacf4c774b SHA-256: 98b720966d29b440fc715f952e3e1bbded36b3e96926433ce95f80f75e9e23ab
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, indicative of a link farm. The presence of the URL 'https://jottigo.ru/strik?utm_term=what+arrow+shaft+size+do+i+need' suggests a potential phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=what+arrow+shaft+size+do+i+need PDF link annotation
    • https://rejovofutilux.weebly.com/uploads/1/3/1/4/131484728/losudomewemub.pdfIn PDF document text
    • https://vuxulirupam.weebly.com/uploads/1/3/5/3/135346280/pofubi-buvogoze.pdfIn PDF document text
    • http://jakor.pro/xikegekivexuzakazevetitskrz.pdfIn PDF document text
    • https://vurigejowuzebad.weebly.com/uploads/1/3/3/9/133997249/5636271.pdfIn PDF document text
    • https://filojekejo.weebly.com/uploads/1/3/4/4/134446685/femama_jivaza_mubofor_bafexifowegazix.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/1559322.pdfIn PDF document text
    • http://trudogoliya.online/craftsman_20_volt_lithium_ion_charger78v2m.pdfIn PDF document text
    • http://alex-travel.moscow/se_clatina_imparatiile_versuric89p4.pdfIn PDF document text
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/dowogaluf.pdfIn PDF document text
    • https://sapukivuzenofa.weebly.com/uploads/1/3/5/3/135341545/dalubazamewawepem.pdfIn PDF document text
    • http://vuvuga.xyz/76991931880edsug.pdfIn PDF document text
    • https://rowikaxaruwa.weebly.com/uploads/1/3/4/8/134863505/8311621.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/9460079.pdfIn PDF document text
    • http://fbcopyright-center.com/435824848686opc.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/7113857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_08486edd0cf6455182f82cf495e2a00d.pdf?index=trueIn PDF document text
    • https://79d8ee67-2172-45f8-9737-086b37aa5bdf.filesusr.com/ugd/2ab2ae_c93ce975a053472daffb7134a11b57ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posufij/gapotix.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/disputing_items_on_credit_report_experian.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_d12609635dd443c9b93ba4be8ace69e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/behringer_xenyx_x2222usb_manual_espaol.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_off00010089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 4908 bytes
SHA-256: 97bb66912be55aaefb2921bfc8721f2b716fe6414248a3424aab6321683595dc
font_01_sfnt_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 11756 bytes
SHA-256: 8221676670ab2631b121b4d1f09e2122dcbe7d3e501e2642fa915e0a3cfd2635
font_02_sfnt_off00013922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13922 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e