Malicious PDF — malware analysis report

Static analysis result for SHA-256 94363233e6e65795…

MALICIOUS

PDF

84.3 KB Created: 2021-03-10 08:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4e9e7523339d4d861da6fc4a750f8ca6 SHA-1: 01ff79911d75493689f2c6fd12ae6769aaac642d SHA-256: 94363233e6e65795a9f890717e0e0ca16b761f925d05285d97b5568dc248f435
186 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and specifically for credential phishing. The presence of a brand impersonation lure for 'uPs' and the redirection to a malicious URL strongly indicate a phishing attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/juxekizonokixow.pdf.
  • 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://jacksth.ru/award?keyword=organizational+behavior+modification+pdf PDF link annotation
    • http://salestore.pro/15686493212fqxv6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450041/normal_5ff02659e256e.pdfIn PDF document text
    • https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/juxekizonokixow.pdfIn PDF document text
    • http://slimerecipe.org/23815361067fapva.pdfIn PDF document text
    • http://eferevole.com/32867980935wt20m.pdfIn PDF document text
    • http://domastmsk.space/tawavebozavopiravibenowi54bxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fc65b4d80cc6.pdfIn PDF document text
    • https://gipofomodofomew.weebly.com/uploads/1/3/2/3/132303323/fitusewir-dubanutexujuj.pdfIn PDF document text
    • https://kunagotuj.weebly.com/uploads/1/3/0/7/130739098/kuzunapuboti-wamegepanawaja-neted-dorugeverefikuf.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_conditions_and_or_raw_materials_are_necessary_for_photosynthesis_to_occur.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/jiwep.pdfIn PDF document text
    • http://savadaqwe.space/340902297229bp0s.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/a2ec18c52cd127.pdfIn PDF document text
    • http://chatik85939775.fun/tarojugivasijazamoxeqeivp.pdfIn PDF document text
    • http://thelandofbadideas.com/gina_asma_2018_indonesiacz0h2.pdfIn PDF document text
    • http://tixshopclub.fun/86714608656m0g6i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/sikuva/wobiwuxakokudoxaxano.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/minixuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/canon_pixma_ip90_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/16854401676.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/18463310059.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 5668 bytes
SHA-256: fcd8f2bd0b55dfcb22dfaf05774ce2e7b1dc63705ec47d29238708468c37fc98
font_01_sfnt_off00011092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 6096 bytes
SHA-256: 400d97edd7ebc843938de3cdab2b555a1328d60cd0154915083304386710c093
font_02_sfnt_off00012042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12042 10332 bytes
SHA-256: 6b715f05126fbd8c2e2b2bd558f6724b68145e80db44d8beed43288259379348