Malicious PDF — malware analysis report

Static analysis result for SHA-256 9113582f9953259b…

MALICIOUS

PDF

111.8 KB Created: 2021-03-13 13:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751162eb1ed13e89d6fb4ae13855ea0d SHA-1: 74a7e50181f95b4fc71988811cc960bb458fd6de SHA-256: 9113582f9953259b87125ada70262e9f657d4386666de363a5a41a4d8042099a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, with one prominent URL leading to a suspicious domain. ClamAV detection and ML classification indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=cigar+sizes+and+names
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/tafalaxofi.pdf
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/kabadaf-kipul.pdf
    • https://panesevagumife.weebly.com/uploads/1/3/4/0/134041141/suzevolotekox_pisizejuradite.pdf
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5fd5f7376dcdd.pdf
    • https://cdn-cms.f-static.net/uploads/4468259/normal_6047e3220db6a.pdf
    • https://wukakokusaz.weebly.com/uploads/1/3/0/7/130739200/gugas.pdf
    • https://cdn-cms.f-static.net/uploads/4418166/normal_602499dd22902.pdf
    • http://sifisomatexow.sportsontheweb.net/66186940636.pdf
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/nuvewemojoki-govojopevufa-gesewe.pdf
    • http://storeeu.info/on_the_road_to_mandalay_lyrics_robbie_williamss1kzx.pdf
    • http://idealslimitaly-ufficiale.site/muxigematagutitalehzacj.pdf
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5ffcc5a8968c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_61adafea1235472db98f1621742ff81d.pdf?index=true
    • http://rininimesoxino.rf.gd/usmle_step_1_2020_philippines.pdf
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_7f10af68fb514a8c84f3364ebc273f34.pdf?index=true
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_0cd5c93d922c417db3c21b5900548e0f.pdf?index=true
    • http://liwetagosozel.onlinewebshop.net/87048649144.pdf
    • http://zulolabopel.myartsonline.com/38402536848.pdf
    • http://pelewonaxiguso.epizy.com/java_jdk_programming_software.pdf
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_080b6896cbc6422fb4330b074bb26811.pdf?index=true
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_d17854ebf8a54a70b64d8030faf8af30.pdf?index=true
    • http://xeganidirosup.rf.gd/cub_scout_lion_handbook_2019.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000163c2.bin
acfd6a9ff128727ee1e21832f3d3618a32435223357eead56e5f522f4e1baf45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163C2 5068 bytes
font_01_sfnt_off000174ed.bin
cea529360bd4166cffacd451f2170f0669929f2fc4226d47b25c2a7811691402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174ED 11292 bytes
font_02_sfnt_off00019b9a.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B9A 16204 bytes

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