Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d2faf29250087e…

MALICIOUS

PDF

82.5 KB Created: 2021-02-23 22:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 665be1fa290e44fd923f82306b3949fa SHA-1: e5143ec6aa437b20e185ad7a9ed364020d9bd024 SHA-256: 88d2faf29250087e0fde9f6ebe29aae7c3b587f079372b6c172bdd64c780ba2c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://maypoin.ru/strik?utm_term=how+to+cook+chicken+and+rice+in+power+cooker PDF link annotation
    • http://makeyourself.xyz/79423778734g85lp.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/q6hhGhc/59487218616.pdfIn PDF document text
    • https://kapegidaboxisi.weebly.com/uploads/1/3/4/5/134527108/2060797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5ffcd443e5e10.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/KIogihh/digi_online_tv_android.pdfIn PDF document text
    • https://goxapixexaze.weebly.com/uploads/1/3/1/6/131607486/fabudagebomenud.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/94eifOT/ranoleropemilixowor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_6016e2b6a3d61.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/DCicjeU/can_you_install_mods_on_minecraft_pe_ipad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5fdc20ee66664.pdfIn PDF document text
    • https://pezimanazeto.weebly.com/uploads/1/3/5/3/135309923/xuwamokiluxom_dezakiki.pdfIn PDF document text
    • http://dvestideyli.xyz/575606820167uotx.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/jegigetexab-ginojevufifox-bubumifabado-pevode.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/XjgjdIr/69750140936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvalinifotu.rf.gd/lupokavinizanosizumalud.pdfIn PDF document text
    • http://puwawujabewup.rf.gd/51654959417.pdfIn PDF document text
    • http://jipinasin.epizy.com/34643845289.pdfIn PDF document text
    • http://wisalawisavu.epizy.com/dodesojabugagikezuzig.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/51809469510.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/romantic_period_in_english_literature_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bible_study_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/nazugakasukitowe.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 5068 bytes
SHA-256: 598be1c7bbfb8b854d69302347b4d11be9b4e62984aad866473606b01604ed6b
font_01_sfnt_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 10560 bytes
SHA-256: 670be9e633838b85109ca12fe4eaa3c82e0b995603af684059e2ae78d28ab7b3

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