Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6b85bc8a9fc821…

MALICIOUS

PDF

90.0 KB Created: 2021-03-25 03:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1193847a507fd0ca1da5195120fb5488 SHA-1: 383985d3b949052bdd5f251e1c7352f5ae82836d SHA-256: 8d6b85bc8a9fc82195f6a9518d4b9fcab4709b27cc0d461f62ed78d893cfc743
146 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/wix?keyword=huawei+fit+manual PDF link annotation
    • http://bebetadiruj.mywebcommunity.org/benmoon_ayurveda_business_plan.pdfIn PDF document text
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/pafikotuva_goxaji_tebaridaxefupu.pdfIn PDF document text
    • http://mestikon.online/egalitarian_vs_hierarchical_pay_structure1le6i.pdfIn PDF document text
    • https://nifogagerosore.weebly.com/uploads/1/3/5/3/135300162/884485d272931.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/basic_formula_of_mathematics.pdfIn PDF document text
    • http://marketitaly.pro/maze_runner_free_online7m9n4.pdfIn PDF document text
    • https://kojezuduw.weebly.com/uploads/1/3/5/3/135326104/5652250e1582b39.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/niwomofemakew.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/gezuladazutifip.pdfIn PDF document text
    • http://vijofogozorumi.22web.org/xilenamuvajekurudofavi.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/girosanimuked.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/vowug.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/79307538237.pdfIn PDF document text
    • http://paxabak.mypressonline.com/61658211622.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zofutigo.epizy.com/76245952734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1a5135-1044-4932-95e5-caac495ec693/rixoxafuriguva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f159de7a-f194-4976-b60b-3a481748acfc/what_does_the_name_tanya_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32dc383-b8aa-4242-aa6c-2b58cbf83c70/does_disney_plus_allow_casting.pdfIn PDF document text
    • http://vikipabolukizi.rf.gd/39275889314.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 4692 bytes
SHA-256: 2c226191e2e17df941faf39385bd623d692e66b44feb38819fa994d97f6be89d
font_01_sfnt_off00011dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC6 11608 bytes
SHA-256: d2be79837e427408cd620039af58e47c21ea92b37a90aef127edf7463bcfcf97
font_02_sfnt_off000144ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FF 16348 bytes
SHA-256: 44344d777475bc27302cf71c6ce9e96b5edcb3cf6b8673c7cacff1863add0d01

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