Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7f44aa042390f9…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 14:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 33e4c975e8b38edbc6750d7f7b68a54c SHA-1: 844fcf0f92914c44002add8fef4b3111523daf98 SHA-256: be7f44aa042390f9198b208ceb471fde97f4dd06a4adf39f5639af90b793290b
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely contains instructions to open a password-protected archive, a common tactic to bypass security filters. Numerous external URLs were extracted, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=enregistrer+un+document+pdf+apr%C3%A8s+rotation PDF link annotation
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/riteda.pdfIn PDF document text
    • http://thedreams.cz/files/demaz.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/62525098271.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6d0cd101---vijezexomutob.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98b9266053---27485021704.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/xuxifivupolobagutepen.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/34170109643.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea8bf5e671---86719977428.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/72316185356.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/et8560l9u80tr8dblj5rmdnbh0/waxakagajebafasuwutiv.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/02b935ffdfbdc56057e518e5f61bf72c/9124050625.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0720e2bb2cc3bff24e87dbc00a76551d/pogezudis.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/makonofeni.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/86464710181.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/32821722962.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/7836c7873fed53bdeac5b2f1066d24e0/22373193721.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/55718938354.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/mobukaxejegoriti.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/vulizuni.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/finusofir.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/gusiwilejonevelilis.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/luvunefegarejedorifurav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 11156 bytes
SHA-256: 046595695afe8a6b38898423eb35029ac462b5ff57ca626dcb0d463e20da6cc6
font_02_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 19320 bytes
SHA-256: 197a814eadc2264e4075e8da21cce01592034d2694772ff760366e92e904dd75

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