Malicious PDF — malware analysis report

Static analysis result for SHA-256 e209a5c795cb911a…

MALICIOUS

PDF

100.7 KB Created: 2021-06-10 04:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f00b007bf91c1a670a24b66fcdabd499 SHA-1: abb8b610c42f8394f7dbafd25b883828adccc345 SHA-256: e209a5c795cb911a6657ae495c76e715fd30e25b053ec521493e97ee8a6e2478
186 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. 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 0.9998

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://xajibur.ru/123?utm_term=grenada+lake+mississippi+fishing+report PDF link annotation
    • https://tomoniwibisuxis.weebly.com/uploads/1/3/5/9/135961627/jefonesuki_worabikumusepe_wasurijolesavu_maduvivum.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/vibegipa.pdfIn PDF document text
    • https://paraminukus.weebly.com/uploads/1/3/4/7/134705680/kozemoxavedizovo.pdfIn PDF document text
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/tenazule_laxebigiwomiji.pdfIn PDF document text
    • https://budoxaku.weebly.com/uploads/1/3/0/8/130873914/taduwibab_vupulu_dizewo_sivazenunipaju.pdfIn PDF document text
    • https://tonulaluxi.weebly.com/uploads/1/3/4/0/134099082/diveluvorekaril_nosuzabajugu_xavagujamam_xelefuvelitoziw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495985/normal_5ff322cd29499.pdfIn PDF document text
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/dbd98291b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5ffa1485eec7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_60191c7fca1ec.pdfIn PDF document text
    • https://vinazawodix.weebly.com/uploads/1/3/4/3/134352366/5925408.pdfIn PDF document text
    • https://pipawini.weebly.com/uploads/1/3/4/8/134888109/5413942.pdfIn PDF document text
    • https://sidujojuwizubal.weebly.com/uploads/1/3/4/5/134587716/dijatenadisamob.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/1740586.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/6848353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144910092/anna_riva_candle_burning_magic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11f0eb9-2be4-46d8-a673-1e5e6aceaa99/cartesian_coordinate_system_graph_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2410d6cb-79b2-418e-989a-9fddeb6e2695/55834735373.pdfIn PDF document text
    • http://siruzosu.pbworks.com/w/file/fetch/144802959/mainstays_4_drawer_dresser_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0882db67-f69f-43a7-96a4-2119e9c57049/que_son_los_medios_de_comunicacion_en_informatica.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_off0001497a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497A 5548 bytes
SHA-256: 50ed25bd44fdb233c82d167ed5f163b355ec814b16b26d09d8dd7836cc089666
font_01_sfnt_off00015c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C35 13200 bytes
SHA-256: 24d388d49c178e6bbca136d3230fefcddf6cfa0b82c52f85a187e72fce70209e

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