Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bab9683886e188…

MALICIOUS

PDF

95.2 KB Created: 2021-03-28 00:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0696878df5e37fbec60a0b4a86590d6c SHA-1: d6ef255f898e02bebfaab2e5035b9423b0e40c2b SHA-256: c2bab9683886e18823e4f897586e11e85136ab086968f977f3d7017a81c90657
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on directing users to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links on disposable hosting, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://maypoin.ru/award?keyword=basic+concepts+in+computer+hardware+servicing+pdf PDF link annotation
    • http://shopee24.site/que_hacer_si_mi_media_naranja_es_toronja_gratisv4dac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_60037ab5c323f.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/star_wars_bookends_han_solo.pdfIn PDF document text
    • http://ericksandoval.com/brilliant_pala_answer_key_neet_2019kkl98.pdfIn PDF document text
    • http://tafiwon.mywebcommunity.org/bright_line_eating_meals_on_the_go.pdfIn PDF document text
    • http://metazoaapc.fun/good_examples_of_critical_thinking_in_nursingdppq4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471236/normal_5fe29ace08cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_603526ac41d92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_601c901597f5e.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/59966249198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_60206525308fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_603c7935ad127.pdfIn PDF document text
    • http://fozogadixanemo.iblogger.org/59231773423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_6015d89f2d734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_603a519ddcafa.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://maxefaronuxugur.epizy.com/judof.pdfIn PDF document text
    • http://zinebozozapi.rf.gd/70674316043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ea8f63-161f-4472-bb79-25facf11917a/rikopixidebovekelebu.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/73709262643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6c10ca-fe84-450b-ac8d-c188bdd4c017/arduino_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb3fe55-b604-4a56-a8e9-60d5f5b089e6/cloud_9_movie_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130a1353-2d84-4306-bd2b-aaf5183603a6/milo_manara_-_the_definitive_collection_humanoids.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_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 5620 bytes
SHA-256: ef430418841a8d2b7727dfb8ecc48482c71dbfbc51e781d6ffbaeecd2531a785
font_01_sfnt_off00013bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BED 10852 bytes
SHA-256: 3432cca543ba0d35c5d557f47c1ddb1aed7cbf1d0d5770a7ecbf83bda953c11b
font_02_sfnt_off000160de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160DE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333