Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac48e99edfed0a6…

MALICIOUS

PDF

79.2 KB Created: 2021-04-26 22:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3a730e9a2385867ffb819f325be7029d SHA-1: cabdb08cc901631e82980b464d82135c30afb2a9 SHA-256: cac48e99edfed0a6d7bfc8159bca8feda6b640e0777b7ac450748736c64694cd
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary external URI points to a URL that includes 'utm_term=dometic+air+conditioner+installation+instructions', indicating a lure to disguise the malicious intent. No scripts were extracted, but the overall structure and link farm behavior strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=dometic+air+conditioner+installation+instructions PDF link annotation
    • https://bilugiwunifi.weebly.com/uploads/1/3/1/4/131408415/luxet.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/697355.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/greeting_card_format.pdfIn PDF document text
    • http://fomoregekamikat.mypressonline.com/comment_dessiner_l_anatomie_du_corps_humain.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/juvonunaxezufegevudo.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/asus_laptop_q550lf_drivers.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/kawid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewenometan.epizy.com/89574000746.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/mastering_cisco_routers.pdfIn PDF document text
    • http://xowevabi.epizy.com/review_buku_awaken_the_giant_within.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_f2bca233b7184f2585564311eb9092c8.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_f670d15e7df44fe9b333e3f671ec7d11.pdf?index=trueIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_4a5beea492934735bfec170948eed532.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_8420d06a36484468813c96bfd4193ae4.pdf?index=trueIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_34aed1348a18415b856cfda7f5a49a6e.pdf?index=trueIn PDF document text
    • http://wumugaronekupaz.rf.gd/anatomy_and_physiology_of_urinary_tract.pdfIn PDF document text
    • http://joriboka.epizy.com/1st_birthday_invitation_card_format_in_english.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/4986704078.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_927e85f403ed4a408ec44c43d92b24ae.pdf?index=trueIn PDF document text
    • http://zijedan.atwebpages.com/vascular_parkinsonism.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_off0000f8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 5084 bytes
SHA-256: ea07e62319762f7fc338d3a8a8aa915b09e34a33ec75287fa83d6bc034dc641f
font_01_sfnt_off00010a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 10728 bytes
SHA-256: 9200fbcf5ca1e5929c255a13efa9398b6e1918418c2e5cbee0d040afbdeb26b9