Malicious PDF — malware analysis report

Static analysis result for SHA-256 59571f30423db023…

MALICIOUS

PDF

72.2 KB Created: 2021-10-02 17:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8d15a9000c06731e4e947d59d17cbe71 SHA-1: a1d66f5d3bef1792613354c57fb6411b9c08ff94 SHA-256: 59571f30423db023d2458523036c8ab4a9526bbd5b8efa04c512364b74bc6a8e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs pointing to potentially malicious domains. The PDF structure and heuristic firings indicate it functions as a link farm, likely directing users to phishing or malware distribution sites. No scripts were extracted, but the overall pattern suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=kate+house+of+cards PDF link annotation
    • http://studiopassarotti.it/userfiles/files/datiminurazulazawarevapi.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/54303497398.pdfIn PDF document text
    • http://qdjshg.com/files/file/kagikubonu.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/fusobovokarugabewapatu.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/leroromewavenexe.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/54841186248.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/taxez.pdfIn PDF document text
    • http://hotechike.com/files/files/masonovesagu.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/mewofeke.pdfIn PDF document text
    • https://harmony.im/userfiles/file/83745742318.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/70636061640.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/wegesanivobofodidati.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/63kodlhumetm1v6a4lchd6ndnb/91898496320.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/113f6e8baa62746dcb75c4a4b9591f86/6820946731.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/79973908916.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/vavamojolalezimufa.pdfIn PDF document text
    • http://lactopad.com/uploads/files/56104783063.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/96705073179.pdfIn PDF document text
    • http://tattooindex.nl/images/uploads/69131961450.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210924/file/68454692162.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/14936632814.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/72794927344.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/sixukelomow.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/lokesateji.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/25340513357.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_off0000b595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB595 10424 bytes
SHA-256: 292111739c1dbff0fd53166b2161410213821b1ab1933a54cf14d0a67aca69cb
font_01_sfnt_off0000cd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 17764 bytes
SHA-256: 02e0379ae9fbf24d36d64566cd919aa50358c4543b6ef448feeb2a891171cd62

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