Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacaf41122e39e96…

MALICIOUS

PDF

80.1 KB Created: 2021-03-31 06:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: db6dc1590cb5476d19cf3a9d52747f30 SHA-1: 82e2c28af5e0f861f4124b8abed34a03432bb482 SHA-256: dacaf41122e39e96253af7b294794e7f95ea85ecf105fb1984d7355823a2e80a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ClamAV and an ML classifier as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous disposable domains, one of which is https://crophysi.ru/123?utm_term=urban+lads+kannada+album+songs+free. The presence of embedded URLs and the link farm nature strongly suggest a phishing or malware distribution attempt.

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://crophysi.ru/123?utm_term=urban+lads+kannada+album+songs+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488558/normal_5fcce1a518b42.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/zudokorez.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/beulah_land_sheet_music.pdfIn PDF document text
    • http://simcars.ru/29517452498whiij.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/kumogigodukarimaw.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/vumogurosobitezimikalov.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/bugagofor_pizojasujebav_rosuxebevarumi_badowekebi.pdfIn PDF document text
    • http://milanbeachs.space/sisifeveroxalopaxuxefuw2xkty.pdfIn PDF document text
    • http://emirofficialzm.com/practical_machine_learning_in_r_by_fred_nwangangao7wxa.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/curso_de_ingles_gratis_descargar.pdfIn PDF document text
    • https://mekebibarefuj.weebly.com/uploads/1/3/5/3/135335096/denoxazaxuzover-lutaviruxiniruj.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/cancer_de_colon_sintomas_y_signos_iniciales.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_6030005d98ac2.pdfIn PDF document text
    • https://puwikemumej.weebly.com/uploads/1/3/1/4/131454306/bisekog.pdfIn PDF document text
    • http://istlan.fun/307431968ttom6.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/6344740057.pdfIn PDF document text
    • http://lazirawolewok.getenjoyment.net/how_many_gold_bricks_in_lego_harry_potter_5-7.pdfIn PDF document text
    • http://myfirstsite.xyz/msi_geforce_gtx_970_4gb_specsrtzrd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/buzoda.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/dunuted.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/45921871473.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/wozitoruxatizeruba.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/64975116779.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_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 5424 bytes
SHA-256: f35b766384ae0af3bcfd94a2c844cf86918747031a7e52015525ca336d85ae31
font_01_sfnt_off00010e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 10772 bytes
SHA-256: 8369f81a94b2a7a1b7bda81b0a52912bb9bf5aa69cb5fabb11f610029afb32bf

Open this report in the interactive analyzer, or submit your own file for analysis.