Malicious PDF — malware analysis report

Static analysis result for SHA-256 95edff3f0e50aed1…

MALICIOUS

PDF

92.1 KB Created: 2021-07-29 21:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ced5548ee3ef836e19a5c24cafea853 SHA-1: f4ee71299380dd39f01ee348174c4cf935034d2c SHA-256: 95edff3f0e50aed19c75061b3abaec45e3b94299db80365f5c769ea41075fed0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=beaks+of+finches+lab+answers+quizlet PDF link annotation
    • http://biotledlight.com/userfiles/file///wixonozilibeto.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eea402980---vafupujafodemajegeribu.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c598e48cf---zobelidojafusi.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8f495253---37521060255.pdfIn PDF document text
    • https://makenie.com/upload/files/mitituvaxovedibuduzozu.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/5cf996ee66b243c604e558fbd3658454/gixutara.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/757c9ebc9a959f256edef81305c53588/19672110880.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/fuxugewutelazaj.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fabbac90651---82534824377.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6093b2aff6096bf3c00bda1246d0fd6e/zuriwunizob.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jo55v1upemj7tohqmf4e4phsft/88213673313.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607247a0e2422---ponegisolagurirojonov.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0fb78464c---numiwiduvusitozuzotarana.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/kuguxolonuviguzaz.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/21707501224.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f240899e4---74771071070.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907f779ca68---69390776074.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/93051899395.pdfIn PDF document text
    • https://themalc.org/files/file/28971146706.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/58197725862.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160702e0b64b4b---rufujav.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088a92e001a0---gakewazagugatuja.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160848ed707556---felavofakivixoranuzolofex.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/jomasujonilaxoxiva.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/fa43a51fc2d9cb88770dba866bcf47b5/99148638766.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_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 18172 bytes
SHA-256: aa4def23591eec1c1d9ca965a565d83e03b144c4521c27f225568ed5d00ac1f1
font_02_sfnt_off0001478f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478F 11108 bytes
SHA-256: 6f262238b552e42899b11f99b0a4556b8c6cdf62e823dc0e4bd2aeedd580d8df