Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fbd1cc51861171…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 16:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0dbbf45e59993d8fe2bac40a741d7600 SHA-1: 9bbc0bf559b03eea3f5e193b3fe59be69eadaf06 SHA-256: 70fbd1cc518611716d5089b9d7d3db47a652d2624fc24e416acfb4e182c7ef14
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Vita-mix 12 cup food processor reviews' and is associated with external URLs that are likely part of a phishing or malware distribution scheme. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this PDF is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=vita-mix+12+cup+food+processor+reviews PDF link annotation
    • http://tehnotop.site/mobilosepapi5c81u.pdfIn PDF document text
    • http://instapodarok.site/49027733749yp4qe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_602a71d9dfba0.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/libros_sobre_el_cambio_climatico.pdfIn PDF document text
    • https://dodafawo.weebly.com/uploads/1/3/4/6/134698388/faperovu_viregiluguxel.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/htgjEpJ/online_master_s_degree_digital_marketing.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/how_to_wear_qcy_t2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5ff47236d1e3a.pdfIn PDF document text
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/gawipobutik.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/jjh0jdt/best_tuner_for_2006_6._0_powerstroke.pdfIn PDF document text
    • http://afracheat3.xyz/58221281618dsmic.pdfIn PDF document text
    • https://xubebivox.weebly.com/uploads/1/3/5/3/135392957/2d1a3a76c0.pdfIn PDF document text
    • http://reabook.online/oedipus_rex_play_analysisn219x.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/ryobi_1700_psi_pressure_washer_price.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/fqgd8hg/switch_console_only_ebay.pdfIn PDF document text
    • https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/rorozejepiwub-wusezo-jekuson-loxaxexa.pdfIn PDF document text
    • https://cdn.sqhk.co/naxudufejik/cgiAsig/40289798729.pdfIn PDF document text
    • http://romeital.space/fegufixomirenataxv0rdh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lufiwivumijej.myartsonline.com/51715609534.pdfIn PDF document text
    • http://nimobavaze.epizy.com/declare_openly_crossword_answer.pdfIn PDF document text
    • http://keburebaxoza.rf.gd/58840743764.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 5448 bytes
SHA-256: 2f2ff59dd03510045a5748fb9111ab101ae2779ee8007e878b9ab1e7eeefc8a2
font_01_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 11032 bytes
SHA-256: 347f0c2b3c19d1a2e989fc45d8b3f592ae12fb2765760818b9c2b99abaf2771d
font_02_sfnt_off0001250b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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