Malicious PDF — malware analysis report

Static analysis result for SHA-256 a076a729df248232…

MALICIOUS

PDF

74.4 KB Created: 2021-02-13 09:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4a77341c2bc56c6ec5f4489b8d9b2870 SHA-1: fdaf6298337e47807aa32f9cbebe9d27dc92130a SHA-256: a076a729df248232bbabaf81aada2b983a83f0677d044c869cb4a318d1360594
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with a critical heuristic flagging it as a link farm. The primary malicious URL, 'https://baarspo.ru/wix?keyword=recetas+el+poder+del+metabolismo+frank+suarez+pdf+gratis', suggests a lure for users searching for specific content, likely to redirect them to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and extensive external links point towards a malicious document designed for initial access via phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/wix?keyword=recetas+el+poder+del+metabolismo+frank+suarez+pdf+gratis PDF link annotation
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/funaxewosap.pdfIn PDF document text
    • https://momugidofene.weebly.com/uploads/1/3/4/2/134235368/lumulotove.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/9148005.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/xupeninadononixad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/calculus_third_edition_early_transcendentals_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/altium_designer_15_crack.pdfIn PDF document text
    • http://wonenuw.epizy.com/anestesia_general_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/uml_class_diagram_c_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/76920672275.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/rocket_league_cross_platform_switch.pdfIn PDF document text
    • http://salilizuvozel.rf.gd/surya_bhai_mbbs_movie.pdfIn PDF document text
    • http://naremijex.epizy.com/cyanogenmod_installer_para_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/43565672270.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/best_antivirus_software_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/45237337976.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/cheetah_keyboard_pro_2018.pdfIn PDF document text
    • http://libejejizu.epizy.com/gelezanuxobovotitewowuvot.pdfIn PDF document text
    • http://wopidexojabin.rf.gd/nonez.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_off0000e0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D4 5736 bytes
SHA-256: a4131744e06a81cf88e88975f7fab85f1a863e381e89f4bcd058c5a6c739b486
font_01_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 11532 bytes
SHA-256: aee44290bf797204f55eb9a728bd9d63e59a7f4bd5a4a39768ea20422c15c2a5

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