Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcee5e7f186b715d…

MALICIOUS

PDF

118.7 KB Created: 2021-07-19 14:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 97048a366a539e33124fb2c8a6764d2a SHA-1: 1dd0fa04f6a78c9b3607298e80d814e352076c1c SHA-256: fcee5e7f186b715d12405ebd06079308a797b0906c2d2804eda5e59eae2b0594
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/80448797673.pdf In PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/viditumufop.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/nufotobulot.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/namexovixutadirupit.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/78311853166.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/gekolepijirotexum.pdfIn PDF document text
    • https://fultoys.com/userfiles/76209843539.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/xebun.pdfIn PDF document text
    • http://cocoal.com/uploads/file/13262799305.pdfIn PDF document text
    • http://thedreams.cz/files/36201512994.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/67562068854.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/4859542680.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0521ff65aa22e5c3267f1c760fe89c68/jaguwokuwiruko.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ejat8tmiaaapj9pd0hdncgenh0/61423102541.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/mofume.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ddabb95c030a3253a9e7820ac7df0f3f/70230390189.pdfIn PDF document text
    • https://atl-50.com/files/file/43334852587.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1729829075---kokuwulif.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088bf13cb4ca---gotoresagokixoximolojono.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/7390873701.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a136af029e---55416410183.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/xusewupa.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/pulojajawok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=gearless+power+transmission+system+project+reportPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00019735.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19735 18012 bytes
SHA-256: f9dee5188f65f3c3e5963b52e45a6438eea1963b0eeba45f562731c81f191f4c
font_00_sfnt_off00015039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15039 17848 bytes
SHA-256: 1d936ef577d6cbba28a41a3f9c0841e51fbf4ec0fc1ce94001550aafcc63f340
font_01_sfnt_off00017f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001b34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B34E 10904 bytes
SHA-256: 3cb509f7566b9eb3dfc0c078816b8f36245527b4613dcb925e64434b62a5ff04

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