Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e5e4aa62c3c64f…

MALICIOUS

PDF

86.1 KB Created: 2021-09-16 03:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e15b8f9f8b4f41b5df1b65fafc90623 SHA-1: 323777e42c53d7e1d2c348a1a956c059d220d726 SHA-256: a7e5e4aa62c3c64fccba973a2bb73e1bf2178c5f8205fd7d8e5b2bf5fbfcf66a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting files, suggesting a phishing or malware distribution scheme. The presence of a 'utm_term' parameter in one URL indicates a potential tracking mechanism for phishing campaigns.

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://pixomot.ru/uplcv?utm_term=joy+live+apk+2021 PDF link annotation
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138bdef57501---dogogarinoximas.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/65890214527.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/gajimebodowu.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/piradoboruset.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/womim.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/25383915419.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16139369d6a3bb---26910789542.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/tofatobu.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/lorafedetu.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/29cd4bfd08a9ac67a8db42b422ccaf69/pepelitakubedet.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/8243748759.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ac6241f42553f4b077c55d012d10167f/jijekijesulogamutanego.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/51355042504.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edbdd49f59---libawabisixame.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/xavikofivolupazibi.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/bamunerenasakeririjeruj.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/napuwuverizogexajat.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c90e2c9af6---32943209454.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/golasefabedizigoju.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/23116450686.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d232bd9122eebe10cbe6f73679df9989/63780169806.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_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 18304 bytes
SHA-256: e65f5f06379f79e48d27992eedab308a67567754f8e88e617171d01d9eb5498f
font_02_sfnt_off00013388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13388 10332 bytes
SHA-256: 70ef3dbf24ad58d042d81b722de3c09bdba82022b2d110a760ab99e46cd1f464

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