Malicious PDF — malware analysis report

Static analysis result for SHA-256 220d55e31872183d…

MALICIOUS

PDF

73.4 KB Created: 2021-09-30 23:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1add629a350b02702715921ff860959d SHA-1: beb79948f238f9e035836d82f97a30841b05d139 SHA-256: 220d55e31872183d269cd41668de460b644fb52b6b65da3c03e4e536c0a14356
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=how+to+design+android+ui+guis+in+android+studio PDF link annotation
    • http://ms-domino.eu/images/file/files/piralazebesux.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6d15a68caa9feb049f824d24ef7ed75f/juwokivit.pdfIn PDF document text
    • http://zenpersonnel.com/UserFiles/file/82032877626.pdfIn PDF document text
    • http://cl-pub.com/files/files/fuwusuleximenan.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/29082146389.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/demufevobuwoxuzozonamebud.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/jotakojutigududajiduzul.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/8528b405ce4fca8810f5c41d61bc2626/43801618895.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/lejazisiwuli.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/48308101206.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/vesefulituxizarek.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/e480f8c1b6ff08d670b64bf30ca81bb2/garokeraxamuvifiliwopujob.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/49773405886.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/rugolorugenukogomebolav.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/gexasuletizixerux.pdfIn PDF document text
    • http://telecycling.org/files/file/vijizale.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/zirurobug.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/91202662835.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/45648426248.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/zurutojumobaf.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/5718544477.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/mobibetonokakuladit.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/533765eb546969b5358ec08db49bcd54/zinosorajaralopugunobu.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_off0000b6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ced5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED5 10552 bytes
SHA-256: f2d8e7eb41f2cf5fb68db3a6a62fbc0240b8a7552a91e5ed5f320b59c690d10b
font_02_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 18748 bytes
SHA-256: 80eac21649513baa8a53d9ea08feb372c6d2223bd538f3cad3ba2a1335c39e9c

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