Malicious PDF — malware analysis report

Static analysis result for SHA-256 8faadf19099d0a84…

MALICIOUS

PDF

86.6 KB Created: 2021-09-20 23:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfdf624548f53cf227fcfb2f0d0de426 SHA-1: 4d47b66ac6cda90508f85e2d2bc013ecb6e6fcfb SHA-256: 8faadf19099d0a84e217a50437a244c23cd43ae683942632c2e177e70e0fa930
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript points to its use in exploiting vulnerabilities or delivering further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=a+love+to+last+full+movie+online+free
    • http://palaciodelosnavas.com/userfiles/file/pivuwopuzeviref.pdf
    • http://xiangzhuan.tw/upload/files/16407882909.pdf
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/tutemipuzage.pdf
    • https://vocembalo.ch/userfiles/file/1232513391.pdf
    • https://joebalogh.ro/imagini_ws/vafogujumemapofulasugijo.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/161426ff403b01---baxikut.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139560d5b855---jemuxozukivefebes.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/picm6o8r88avrvrcpmq5tg5e51/bojosolug.pdf
    • http://medicaldistri.com/ckfinder_files/files/63799616908.pdf
    • https://marathonblainville.com/userfiles/files/tubiwulanijib.pdf
    • http://sbcnepal.com/images/file/11328526772.pdf
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/31249888617.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316637d52e8---72902723558.pdf
    • http://otworz-biuro-podrozy.pl/userfiles/file/zetaxowifer.pdf
    • http://ameshamagazine.com/js/upload/files/zamolitupobuvozebetojo.pdf
    • https://promoxcenter.ro/ckfinder/userfiles/files/mupemagadiw.pdf
    • http://iproperty.ae/userfiles/file/33341876207.pdf
    • https://masterjobintl.com/ckfinder/userfiles/files/gosuvimomojutagugu.pdf
    • http://elverum-revmatiker.no/images/file/busuzobe.pdf
    • http://laiyi-art.com/userfiles/file/16097274168.pdf
    • http://benetalent.com/upload/files/45773068823.pdf
    • http://reklamavysocina.cz/UserFiles/File/pemepizifi.pdf
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/9685014779.pdf
    • http://twgo8.com/uploads/base/files/202109152047237303.pdf
    • https://lekkermooi.nl/userfiles/file/82197694718.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef97.bin
19d0aac0cd5479c10e15767ebde26ea61e3a2f769e4282cbe72a883745685e19
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF97 17528 bytes
font_01_sfnt_off00011cee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEE 16792 bytes
font_02_sfnt_off00013505.bin
cc8699a7c6b04aca393fdd8c865fe5cb224d34a315cf4b29ded1350f57e5c80c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13505 10524 bytes