Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26f2b8abce9570d…

MALICIOUS

PDF

98.9 KB Created: 2021-09-19 04:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32f029c90ebb0eb12f927a5019506ab4 SHA-1: 33e4af72471fc0dff729b863b876b31334fd83b3 SHA-256: e26f2b8abce9570d234ee09e2716a01f27c2419c2b9231feeaac1e2c9923df02
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a high number of external links. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely for downloading further payloads or redirecting the user. The numerous external links, some pointing to disposable domains and employing UTM parameters, indicate a phishing or link-farming scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=pokemon+sword+and+shield+apk+download+without+human+verification PDF link annotation
    • https://highendteen.com/userfiles/files/15989589522.pdfIn PDF document text
    • http://rooptex.com/uploads/xajeg.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/xusetapevagusujulokise.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/beduwojanezajalawozafepi.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/totoxipaxoxopovomaxejule.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/5528884170.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/vapewitunomorikulu.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/geratibigawona.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/giwabamiz.pdfIn PDF document text
    • http://tzsunup.com/upload/56811113026.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/43990715178.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/kisalenixomererudew.pdfIn PDF document text
    • http://enkepharma.com/upload/files/roxoluzakaxo.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/18056222495.pdfIn PDF document text
    • http://klemanpince.hu/files/file/vozibavisazof.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/78811999816.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/fozizal.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43708222758.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/73385469180.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/69928382482.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/dovetobe.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/49797238840.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_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 11232 bytes
SHA-256: de1405d53003c46d8ccf8ef797300770e41ae3e936f73ae2c8db7dee34493d72
font_01_sfnt_off0001340b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 19104 bytes
SHA-256: f0d4bae98eacffe8a301469107d8f5454e78e73978e41e9f4902771eef3496eb
font_02_sfnt_off000165cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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