Malicious PDF — malware analysis report

Static analysis result for SHA-256 080dc2f32e198838…

MALICIOUS

PDF

71.7 KB Created: 2021-09-19 19:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 22a41da29e8c1574ffd95179bbfb9271 SHA-1: 7daab0ff881c3f8b828f7ebee676e7056fb92e90 SHA-256: 080dc2f32e19883802d373a9f5fff9b208d9471c9adeb4ad49134dc79c49b338
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://synerhu.ru/uplcv?utm_term=best+app+to+open+pdf+files+on+android PDF link annotation
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210908220839.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/3364809644.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/38751413038.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144d8c4a7bb8---fatenemefekiwisesawofex.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/88030839163.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/94209525349.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/dewis.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/84552287679.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/ravifetunurivijagalefuxep.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/pefodefoxagewexuvelo.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/5366332158.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/kezewo.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/dafesukokawurixozimowuni.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/12402380682.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/pozajevogesur.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210903_024815.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/mulolonudikirosi.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///tubojowovasej.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/63489352794.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vizix.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/letekipajire.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/sebize.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_off0000b76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76E 16212 bytes
SHA-256: 2c9a96bb64a0d6c1c78d1d507869ffdd3878b4eaf947fc54044c0204f748cf9a
font_01_sfnt_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10544 bytes
SHA-256: fa8cecf0d43ba197a82b5077040d25e9a5425b6d3ad215d9e0e8c358264d0302

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