Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4fe2a0a35fa4ee…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 10:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9de2ed37b54e857d14f17d7f85f3493b SHA-1: 0041e6181958e22e3f858bef35eb33421abdb614 SHA-256: da4fe2a0a35fa4ee7cf694c941a37bfdd19a1b8e44ab25f8ff5b71f1f30b06fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, likely serving as a lure to download further payloads or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=pes+2014+ppsspp+android+descargar PDF link annotation
    • https://ratoempat.com/contents/files/jolaxevo.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/waderezobiwutelenopa.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/nefuladesog.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/kigitoneganupiwepoziduz.pdfIn PDF document text
    • http://alcantara.cz/data/file/bapexoratiresagisaxusu.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210901192746_t07clu.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/todab.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/16992590491.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/5873468755.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-12/20210912033253792264.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/40234799199.pdfIn PDF document text
    • https://parfumzone.ro/files/file/mixatebara.pdfIn PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/kazegedijigi.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/16076473109.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/dumekap.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/jifuzipade.pdfIn PDF document text
    • https://morabia.fi/images/file/vejexapuregajitarevadon.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/16054590502.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/ludaze.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/43044380466.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c69edff54---12052918920.pdfIn PDF document text
    • https://empresa-venta.hr/files/32736611196.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/40872018577.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/90073349498.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/bimokodikedebaji.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE234 18680 bytes
SHA-256: 378c17ff1e1e4b5b64eaa9cf8d236aad7228e400eb59e159afcbc48b1503da31
font_02_sfnt_off000112ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AD 10920 bytes
SHA-256: 0cd7947663abce8cf6bf11d9d50dc03b3c04d634c9d15db81d5f4dbdb63034a7

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