Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e12ceb9b810bf1…

MALICIOUS

PDF

80.5 KB Created: 2021-09-11 23:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 05bce5fdc00e067bf9e932757763a0fd SHA-1: 62b6f8716e4d2690085ebe5ba0f1415f894b7a95 SHA-256: f2e12ceb9b810bf15aa79c51c71616ad3b0701f832003021682f61372f06ee79
146 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs pointing to disposable hosting, a common tactic for link farms and phishing lures. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allytemp.ru/uplcv?utm_term=how+to+find+internet+password+on+android PDF link annotation
    • http://studiomarazzi.eu/userfiles/files/97903485989.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/jipinemiraperul.pdfIn PDF document text
    • http://skupka54.ru/upload/m/mataga.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/11770531742.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/66168717282.pdfIn PDF document text
    • http://newo.ru/files/files/62739483480.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/46493075403.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/8418221550.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/famisesufa.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/6586820626.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/93123591187.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/felibefagov.pdfIn PDF document text
    • http://gr-chem.com/upload/files/lixemofifi.pdfIn PDF document text
    • http://ifap.it/images/file/ripazakexurolowonenujaf.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/danovimixir.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/34131303642.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/vaxalezogatod.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/16345575437.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/molifogilunukalu.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/davipivef.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/91992217575.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109102317062961.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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 10520 bytes
SHA-256: 70603af50dd99ffc97231bf9fafbcd3ca8dd5d45d427e13ccffa0bdf575e9ac1
font_01_sfnt_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10632 17940 bytes
SHA-256: 8660083a213c7350f25877167986140db11c0762564fcca5a98e38b10ceaa0cf

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