Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e501fce664227a8…

MALICIOUS

PDF

128.1 KB Created: 2021-07-12 23:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d785621237c7cc17fde1f99b519619a9 SHA-1: 37d9a8f5fceb53c92ece88b605bb3fd4e4f946d5 SHA-256: 2e501fce664227a8dd273f749613e99301e4f414e47d1f36206374b830e85dae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is being distributed through these links. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9736

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=dragon+nest+spin+off+classes
    • http://extracam.es/app/webroot/arxius/file/63987360409.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099de3f95677---wivomo.pdf
    • https://tradingphrases.net/userfiles/files/66450133611.pdf
    • http://booklandbooks.com/userfiles/file/nelotanezidinisisopilem.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i3fr0g0186087ufg3f1ih5afl4/61319210574.pdf
    • http://korean-school.hu/hangul/userfiles/file/selemadomisut.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/13126ef957328ef71f1028ac16ed2ba5/37619717680.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/7uk4m6i3rhds8evtr71cbv5jvb/nozawedesigenibisabeguf.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6cf2f583---2616543648.pdf
    • http://asijskepotraviny.cz/files/file/botavudiletilipede.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/b711302b5470bd68e0e0f383296fe367/63361433588.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e98358e5f38---53348030945.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/651452e84e1901cc35e82d1ec33b744e/43388235134.pdf
    • http://liffeyartefacts.com/fckimagefile/file/1486483127.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ba196f1ae---xenefakirurumudazet.pdf
    • http://asvpp.fr/pdf/6736900996.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb6dba4771---88681423279.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ebfd17ca9---42893377507.pdf
    • https://divinenine.net/userfiles/file/91806980554.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5a3481ba9436dca707c531c24dfdb703/bamuladezifesanolesipid.pdf
    • http://glotecgh.com/upload/editor/file/89497106144.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e790bd0ce44---jowevenim.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899f2235ecc---wokewajotixa.pdf
    • http://tfh-filter.hu/_user/file/31106962256.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013525.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13525 16792 bytes
font_01_sfnt_off00014d3c.bin
a96a57953573aef09d85b5433f8ced3674b345a42449f2f06beb0d4028406144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3C 10656 bytes
font_02_sfnt_off000165c0.bin
7ebc7563403e82c32affa1e998a03379d51ec65ffb6819ab5579a2cdcdfc981d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165C0 24012 bytes
font_03_sfnt_off0001ad2b.bin
fd38ce00d7384ba3e14201d0e825c9eacbf65fb92dab7dda8f222c1e9f3afefa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD2B 16352 bytes
font_04_sfnt_off0001c353.bin
bbf484d765bbed9901db71d35b02c4de9d3cd7fdb29881bdb3a7a1ba8f4c67ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C353 17964 bytes

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