Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f31a7b71c04dad…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 20:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a69dbb781ad3785569dc2f638a1e9fa4 SHA-1: 797255a5400c31b58e7eb4ddb9cb7ea3e11083d9 SHA-256: f2f31a7b71c04dad56d81d9eef736ef58ffec6579d3791b531b345e05c70b484
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_MFA_LURE' heuristic strongly suggests the document is designed to harvest credentials by mimicking a multi-factor authentication or one-time code prompt. The numerous embedded URLs, many pointing to disposable hosting or compromised CMS uploads, are likely part of the infrastructure to host the phishing page or redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://thephinhmienbac.com/upload/files/ninujarapuxefubokajelaxo.pdf In PDF document text
    • https://zlataraburmevuckovic.com/files/69927715289.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e5c4d0988---74414531296.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161398cf692655---35003230999.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/10354479282.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/rujozidemizeranelubedira.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/68119406502.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379d1713f51---mulopixazinevagog.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/sagipavopemumasid.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/zajimumejesosabavarope.pdfIn PDF document text
    • https://satesayap.com/contents/files/53357163806.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/1842194257.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/54010212157.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/42740023396.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/65857285262.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/29146348456.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adf3364c7a---60816197807.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28afe41931dcdd0ef329524adc66dc95/latedifurox.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/85138448091.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec0d080dd2---30914471830.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/nufoxiduwaj.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/xirelegomunegede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=android+api+designPDF 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_off0000df5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5F 17312 bytes
SHA-256: 9943bc5ee004713fe6f33f1b3cbf9b76115dfa1e009ef8f9bcbd4ce6efc4c206
font_01_sfnt_off00010c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12459 10404 bytes
SHA-256: 3e9b63c45876eaf40acb3563c31448f705aea8e6d0de6e6c6f5b37079fa5b92c

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