Malicious PDF — malware analysis report

Static analysis result for SHA-256 725711651326830c…

MALICIOUS

PDF

94.0 KB Created: 2021-08-20 22:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 0c0edc5bbf5a646d81bf22c23c60b6c0 SHA-1: c9c302acfb9cb2c48815b45c80bc5929eb302a6b SHA-256: 725711651326830c968d05ed2bd571f481148c70b5bdcac9991d482c44a56190
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to various websites, some of which are hosted on compromised CMS uploads. This suggests the PDF's primary purpose is to redirect users to potentially malicious external content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://linkingpeople.info/userfiles/file/vonurixot.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609904c60fa51---89228447035.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/sasokedegakigepajufep.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d4e729d10---52692613893.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ff27fin39uqihglm1qvspuetn6/96924137779.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/43282361554.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/3ca3e4ac4078288c129888bbe19553d6/90393675330.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/kipofofetos.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/5fffcd93c1e696aa6ffb64adcb5c1051/gujanizulexuritojune.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/jt49vcmitpb7kqg0dbc0p8a2ld/89829626558.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/lomikazaf.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/sv07ql0s6akt271q9jklvshoim/79098348263.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/xalinavuxa.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/xobolago.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ec12e8a8b5547646a92116b82205ce18/wigexuredofojawat.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/milujorikozokijijigu.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210814_C1265570D446062B.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/53523371343.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/bugaranojod.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/6656052172.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/sirulokofujinebogotobizi.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/49442837402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+throw+in+reciprocating+compressorPDF 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

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_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 17808 bytes
SHA-256: 3dad98be02b96695c7f34354dbb9e6d1e7754ea114f64f4ddb938bb06b00bf90
font_01_sfnt_off00013945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13945 10852 bytes
SHA-256: f1005e41ce0e38a331acfc5a5379398d5fd0f13dbac7f930227caf6195f668c5
font_02_sfnt_off00015244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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