Malicious PDF — malware analysis report

Static analysis result for SHA-256 b079b31ba8bc87e8…

MALICIOUS

PDF

83.3 KB Created: 2021-07-01 09:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a54bc232c0e57df72bcbb7458ce6a28f SHA-1: 780da49b04aa00064e131898bcef64e94baad51d SHA-256: b079b31ba8bc87e8a0b35b1a38759f9289bdc002bfa3336a89e4fdcf075cc1b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that contains a lure to execute commands via the clipboard. This is strongly indicative of a phishing or social engineering attack aiming to execute a secondary payload. The presence of multiple links pointing to compromised CMS upload storage and disposable hosting further supports this. No scripts were extracted, limiting direct analysis of payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f5b42e3cb---sanuga.pdf In PDF document text
    • http://apsara.ru/userfiles/file/54938608201.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/luguw.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/lasipawirenazoxamowigef.pdfIn PDF document text
    • http://promador.pl/userfiles/file/37710828072.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/44580031597.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b0dab0f71---91020816285.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/26667587489.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/73571132926.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/170cc7e786689204bbeb3c996d489de9/33302229306.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/segadufu.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/sogovevajeteno.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/p4vd3sk7u4nve6s41k2nkjit56/57307672210.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbd42d0577---54009134300.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/611da1d90b0dab1dc8c332a2c6d15c21/50374894852.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa249d410---gotakulijogug.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/f743ifpj5i16olbd1bl3fal6rj/72690560162.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/i6kt7ld8dgcjo458q46tbc6ad6/metotopukujazo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2f1d01731---fimesanonoputukolus.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a46550a05c3---66120998965.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/73049681835.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/wadopejogawarexodufotexi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/0f6a540aa966a6376119e3206d378930/16007999547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cwm+recovery+imagePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 17512 bytes
SHA-256: 56e803a0e76a7bc8c6c801a67b0641dfa2e3eccf6755ba8d86e8352acfd8398e
font_02_sfnt_off00012869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12869 10456 bytes
SHA-256: f6b4d25b8e7b84105ea58822b83bb26400ed727dc672c8947726052c94161a20

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