Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06e1e675f7ffc09…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 03:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: db050307b1a55c3da5b7244f6b6893f9 SHA-1: 9ffffa3664854376d092ade96f88b7dc9348912f SHA-256: c06e1e675f7ffc09161a079cfffb819cb1e6b96bcdb183309a4dc1047f25b211
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=akuntansi+pajak+atas+piutang+pdf PDF link annotation
    • http://escqatar.com/uploads/userfiles/file/file/vazereluponidomitipuji.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/xuvowojoroziwakifilivif.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/b808baca748c998ee5ed2baa5cc2a35d/52356558928.pdfIn PDF document text
    • https://noddy.nu/images/file/18146017807.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbcc4188ae---36287333111.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/fujodiguxutasoma.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8b91eb2a---5696939817.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d87709539a5617f5c8aa1e115d424614/gasunavep.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fbcf0ec6b1bd40ee2185503b69f9428d/lasamajaxamixupenazix.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/vefezidupepavokozit.pdfIn PDF document text
    • http://kalikraft.com/images/file/47793871159.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/adaa5a14b4a3f60c8d0ac8cb5c7cf769/dobunosuronon.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160753dde093c7---98893910382.pdfIn PDF document text
    • http://szwygs.com/upload/7249398364.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/4b7o09q9e2cpjri3n99uc2gudh/wobipewavidipimen.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/85601467927.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/1147081621.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/kopubakurozonekinagerul.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee0c34ee755386a785862ed3314b8670/58944895990.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8fab8659d1db6437791037db5cbafd61/94441437442.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/29717290934.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612b322eb50b3---83947975086.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/44e3a33dc68d67a4fe88cd4712c30886/xazutetibavodeguri.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_off0000d7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 10576 bytes
SHA-256: 864c8de8a24ef3612bb526d0b4a155a7997f4dce163b511681359c9e8bdef647
font_02_sfnt_off000107d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D7 16336 bytes
SHA-256: 1acdb3efee5d1e2038e4b7e356a24d572fdbffd8db5981132431115d0689b73c

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