Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4c44ffd389ec3e…

MALICIOUS

PDF

78.4 KB Created: 2021-10-06 20:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 449dc7ede04133c9c95b6a1e7c827784 SHA-1: 6ca4b18b6de75802a76ce09c474e59a6a78396ff SHA-256: 2b4c44ffd389ec3ec711ad6a2759671b305af25a7844cde4bf1963b3cfffa783
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to lure users to malicious sites, likely as a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=15+volts+to+amps PDF link annotation
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/fofosimibuli.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/lewelivukasiwasolaza.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/38229534631.pdfIn PDF document text
    • http://trouver-une-ssii.com/img/pics/files/guvetatarisojopawoturo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140290672694---66046002292.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/7887832258.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/petoguxazikemirobixonodo.pdfIn PDF document text
    • https://defi128.com/userfiles/files/karinulubarona.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/rupakidogagime.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/8521675106.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/xogudulimi.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/naridapipimasolofoxeri.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/17208907512.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210914_FB337D70C198F22E.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/sokeda.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/xivaxinu.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/xigibipet.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mopopuwevuzazibelo.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/5ec600d666f5ae7f17fe4d7091ad13cb/10415045108.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/wororasozanenutugutege.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/xagesewaz.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/gulipanuzad.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/nevopomibiralogodaj.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_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 19276 bytes
SHA-256: 14026be98f128ffa571427868ff6d8663a329d2052e3d214dcac14046ff03149
font_01_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 10140 bytes
SHA-256: 3f01157cbdd7b799d79f65cbd2876915ef45aacc0844e77eaa57ec63912044ee
font_02_sfnt_off000113fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1