Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb64a9f5e64ae0b2…

MALICIOUS

PDF

79.4 KB Created: 2021-07-31 14:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8209bbbe6f036ef2549aaf2727d08b5c SHA-1: 26af5724bb42b3153812ac05b5f6e9a48ad8e4f2 SHA-256: bb64a9f5e64ae0b2bc12ad1378a9c55f16c8f15d497f5d0ad0d7388a5c553294
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads and potentially lead to further malicious content or phishing attempts. The embedded URLs suggest an attempt to lure users to external sites for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/dd183ed6fcc7a2fa5ac9aecf36e926a7/23188227658.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607c408a70963---fuvidubupegonikibarog.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/963ce959d81ec919beba3d3e6bc29845/bitopite.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ace8f28a5f5a8cea222c218c46b129f2/zanip.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/99082lqgpi295vmsdpoe9pfgb7/gaban.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1289c474ec---wiresikelininujulevebolup.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/7180d56da80e29e714de14bbd7b01585/50780120800.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/xigulevo.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/151287619972b2a83bae4e51a97cd634/kenerak.pdfIn PDF document text
    • http://rts-3.ru/upload/files/88653234629.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/rafewerupovimefuxavuj.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bf5084adf904e0a0100e7147389f6b21/jalasemigekopuxubepisebaw.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab77b56caa8---45410538731.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb8d7c152---96930329787.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/80855453632.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/gibefuvokegozowomadanom.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/e9175a5932ccb9de36898257967519db/52454798810.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-21/20210621114216233108.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609d61fc7c20f---53834752143.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/rupuwawefulepez.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e12a9487b---20266475274.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/9eac6d3a2fd6e25106964e13ac562267/netitapijotuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=harry+potter+3+full+movie+in+hindi+dailymotionPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a82703ace6773dee7e5023e9cb6ade79/1764128857.pdfIn PDF document text
    • 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_off0000d0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 11040 bytes
SHA-256: e079a7c74f8d64b4bb19d0261ef3476c9652651f2da11ddf3efed7e91c35a14c
font_02_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 17648 bytes
SHA-256: a6b56dbe796858e7005a320d8bf18219241f1a8ae37c18fdff2d7ee3ee8b6418

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