Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d1f67a78e1ca8…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 19:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 528adb48322f4f55d4f2c0759edc3ab9 SHA-1: aac6b81a73b06de0ef0fd20fca168523fdb8bf7d SHA-256: 0e4d1f67a78e1ca88005b036f6920e67dddda9469ee0045e7cbe8c5245dc8360
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=mage+and+minions+unlimited+gems+apk PDF link annotation
    • http://zifirarukax.22web.org/66092555753.pdfIn PDF document text
    • http://pidusejop.medianewsonline.com/19206201566.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/eiiijgg/spill_water_meaning_in_urdu.pdfIn PDF document text
    • http://hookup750.website/27371771632nbwyx.pdfIn PDF document text
    • http://xarolizanep.22web.org/91516521868.pdfIn PDF document text
    • http://d2-club.ru/14483941806xgba8.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/WGlcihP/folipinof.pdfIn PDF document text
    • http://worldworkbook.com/what_is_a_causal_comparative_researchf2xwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judejelalub.rf.gd/mini_split_heat_pump_consumer_reports.pdfIn PDF document text
    • http://pewusufep.epizy.com/64209956163.pdfIn PDF document text
    • http://nuzabasere.rf.gd/angielski_repetytorium_leksykalno_tematyczne_poziom_a2_b1.pdfIn PDF document text
    • http://pevibije.rf.gd/insinkerator_badger_100_clogged.pdfIn PDF document text
    • http://beruzamewog.epizy.com/quarterly_report_icsi.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_3dabee8fc47144a295adbb45f6ae4470.pdf?index=trueIn PDF document text
    • http://nesazovopiw.rf.gd/45951764380.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/attorneys_act.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_69cbe46d022a4a76bcbf7cb297061a16.pdf?index=trueIn 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_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5252 bytes
SHA-256: 2593e064a26c88ab2e4bb33c0c0186d20e97fa9d9ab1c3f420dc212381d1db98
font_01_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 11180 bytes
SHA-256: 636d8c4d2031ea95e89e21af2cb0f9ebce381407b74599f68cac82612f3384eb