Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7511df1b9e3b0e…

MALICIOUS

PDF

82.8 KB Created: 2021-10-13 16:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5215f813d0497828f65014348d750a96 SHA-1: 8c69e13d347fcfea63288e4821974e8ff5693ad6 SHA-256: 9d7511df1b9e3b0e6a329e26674f20491a2b734e0703216d8dbb462e8b8db7f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains numerous embedded URLs, many of which point to disposable or potentially compromised domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://hoteldazegliotorino.com/userfiles/files/pimezapinuxane.pdf In PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/wisebaxe.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ec8c1db28e---59371100453.pdfIn PDF document text
    • http://strandedtattoo.info/file/pixorudixonenapiwuxaruliz.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/24219556593.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/bebelanipi.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/54037695631.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/mefedadutapoxabumudupamo.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/83035038887.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/vopivatibezej.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/9876575317.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/19420026518.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/lovexetuxigovazujunax.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/dewakasesukilobabumi.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/wawexoxedalivem.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/gezelebiloguzekewimo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1608a6ff93217914bed28364a48cac35/26871743977.pdfIn PDF document text
    • https://highrise.pl/file/julobuxezevufef.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/66186904041.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/rimimafoxe.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/zuvugureweze.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/26354810483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/UsNeCLCzgYg/uplcv?utm_term=answer+key+of+bed+entrance+exam+2020PDF link annotation
    • 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_off0000d7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 19272 bytes
SHA-256: f43b34557b108d944031431ff7cd7a7ee3133eec7d39ba027014aeadc37d336f
font_02_sfnt_off00012337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12337 11256 bytes
SHA-256: 722d916c05e16b8a1637c2b6783b66ca58c1a0f76fd8bad0a518625db65c0e41

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