Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab93e1a19fd04bc2…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 10:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e57f5ce174d77578d926da6bab125cd9 SHA-1: aaee4357206a01ff34de6ec4f7b36a969cbaf9f5 SHA-256: ab93e1a19fd04bc29255c762a601030f0a465b1dfb1fd5c085edfc4eb626a577
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and PDF heuristics indicate malicious intent, with multiple links pointing to compromised WordPress upload storage and disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a77609bfb5a---38623408870.pdf In PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/olvhpob88a0ih5vrh9k4f6o7e5/90459092861.pdfIn PDF document text
    • https://terracell.info/images/file/pamir.pdfIn PDF document text
    • http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/96115658913.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/58111444442.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/zomiwakubaxazuwol.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/mujuzatazen.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4754615f---16247553390.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16087bc975796b---53380523018.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cee248cce3---sidazixeloxanewizukuro.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/13546038598.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/18765a337f951808c6127f14003f0017/mimesovafomexitoloraviji.pdfIn PDF document text
    • http://madspot.dk/ckfinder/userfiles/files/10823935908.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608107fc162bb---jofovoxo.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/wesojofagetigiwibugubu.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/gesamizijiwunure.pdfIn PDF document text
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/lavenapufedu.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/36246337246.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/54844fdd0d20561e6cbfe17311e1ac31/fuxirifutimowajapu.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/81455065631.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/40788668616.pdfIn PDF document text
    • http://ndt-ultratech.com/files/37820539797.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/1753d0c60f7f86f1e7ae10c2a721ec33/xenabigovodifidagep.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160dd981116228---72541952381.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace5942eed1---98551297974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=rights+and+duties+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 16300 bytes
SHA-256: 8a6338f85769f5e90d16a3f0dc05e40d05b1603a261efa807c05173885f35c02
font_01_sfnt_off00010cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F1 10656 bytes
SHA-256: 80b8b6fd9547dd90425cf85b698ae59c9a8944378dd7d79634288b27f6fc513c

Open this report in the interactive analyzer, or submit your own file for analysis.