Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7f347b53582c2c…

MALICIOUS

PDF

112.5 KB Created: 2021-08-08 22:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 300020bc56769acc0f6008d6546f0f52 SHA-1: 313710998707dca3059c8c7800ebf13b4807ef03 SHA-256: 9a7f347b53582c2cf8c07337e2f507f048a9ab9eb9fa8342487cb3959676bff3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to websites that appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be directing users to potentially malicious or compromised external sites.

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://zegabilisim.com/calisma2/files/uploads/50462344484.pdf In PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160733531f369d---paxeluduniwinofas.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/girukepakawajufa.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/57891208203.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/282cdfc544329eb1e58339afd8fee406/julajavidajideziros.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ecfa8f14375---kigowogalunonaxubo.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/222be86e65bedd1774cef4f8f0b2fbb1/zumotijutukififeped.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cb5f3a4c7---16679199285.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/bekopirisinuvekod.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fd8b09c80---vedimoluwuzupijatuge.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/49368607427.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c917e3b173f---lavuli.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/75368933487.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/taxijupadi.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/lifijuripa.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210607_23f44.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/df6d41a943034786fb9b27f9d9a79a48/58874868806.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/27926138639.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/36870606153.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/7262373023.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/33496863088.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb99d50bf---ligunarotijamemujewugo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608223e107ec1---58424277041.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/55860055562.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=historia+de+la+palabra+fabulaPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C0 16148 bytes
SHA-256: 9dbd86b547c789e693a9447677f94902def939eedb7b34c80af7161f7c191d02
font_01_sfnt_off00014748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14748 10620 bytes
SHA-256: 699cff1df80ba80e0996bc283fa74b5e1ca7091639f9f58f319f9ab710349ecd
font_02_sfnt_off00015f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F6A 19676 bytes
SHA-256: f1cd1b0a82df6f2701bfd472018cfbee6e48bfd9bad894c564b6055accb3c358
font_03_sfnt_off00019101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19101 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_04_sfnt_off000198d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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