Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac91b30ad9beade…

MALICIOUS

PDF

83.4 KB Created: 2021-05-03 13:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 787430ed41beab640c6174b2dd2181e0 SHA-1: c7f1c91e881e88544dab4c79fddde3b67eaa5b2b SHA-256: 2ac91b30ad9beadee35b33d84e941c592b3b6cbfb0887ec5dda6036f6fe7a57f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs that redirect to link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/strik?utm_term=how+do+you+clean+a+cuisinart+dcc+1200+coffee+maker PDF link annotation
    • http://gayerkan.com/en_arris_routerp67hw.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/9745159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_605aab6a7d13b.pdfIn PDF document text
    • http://polfact.site/farm_heroes_super_saga_appleuzh97.pdfIn PDF document text
    • http://remont-pc.website/decimal_tenths_number_line_worksheetswi0gk.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/refavepexanu.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/vbVekhj/84698336281.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/dizalesitikuwetirojexataj.pdfIn PDF document text
    • http://idealicaufficiale.website/company_of_heroes_2_us_guidek93x5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5fefac8734266.pdfIn PDF document text
    • https://mefojenunir.weebly.com/uploads/1/3/4/3/134310277/kotifimodobas.pdfIn PDF document text
    • http://bunedose.22web.org/3712243629.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/6214371.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/39286273177.pdfIn PDF document text
    • https://cdn.sqhk.co/nivabetaz/lghihcL/fikinetuzivimewodiroso.pdfIn PDF document text
    • http://tevituvodejifep.mywebcommunity.org/15772450167.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/smallest_reader_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fe6884a0f9ee.pdfIn PDF document text
    • http://5-euro.info/who_sells_greenworks_productsod8x2.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/cvWcs1U/catfish_cooley_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/nulogoxeja/oZhefLz/3351319764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vafotuneg.rf.gd/contractor_s_affidavit_template.pdfIn PDF document text
    • http://galinuv.rf.gd/anova_test_example.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_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 5712 bytes
SHA-256: 959c6121d7c28360dc9c96eb8128cad36de7f77ce8d7fd93d2d852abb9cb1e5c
font_01_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 11168 bytes
SHA-256: fafef053de3669b1e5fa3be448e1df4f02e900e28c0eb066e8cb787c6f3ec227

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