Malicious PDF — malware analysis report

Static analysis result for SHA-256 1697a45ed3f1202d…

MALICIOUS

PDF

94.3 KB Created: 2021-06-29 23:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 841512ad76faf1d0575fabf19ec46f43 SHA-1: c2e71633759730705598eaf83c5e0aabf5bb20fa SHA-256: 1697a45ed3f1202d0936f1fd48229ed667a4b9fed6f6b73d31e1e3c40d9ce36b
156 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 it likely exploits a vulnerability or serves as a phishing lure. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories, such as http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c348deb8961---91665566885.pdf. These links are likely intended to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://elmbbq.com/uploads/files/gujixofavoge.pdf In PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/86b187a16d02fbcaafea42b07d5ac230/jokonovikixudo.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cb1082b94a52cc42077de9702d883b78/88878951437.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/4815009207.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab95024f74---10914980784.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1284559c3514a9f78aa1da6ce954f308/mupozimewop.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9dda2ac93---83985508404.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/darekagejubovupisebof.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/92551tuo7ourupdtug5q92n717/fusomubazunetopekukafomu.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/78520589071.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80a0ba069---rafigojonirikojunugilipe.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/zevubebabekewetazad.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ae9b03ca3131a3a710fc111d4b71c315/20229210933.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f0126242c447bc52e6102e5a78b52356/lewegaturabis.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/969107b01f2a537b307a6db2195ca57b/widolovijujetimobutazeguk.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/15257679558.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48577b095c---74490348455.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/de97ee5d93e2d6c67b048444d297ea1b/81095500563.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c348deb8961---91665566885.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad848530e5---xabiwifubizi.pdfIn PDF document text
    • http://sun-eko.eu/files/file/kiviloz.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/veragijisisakinuwox.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/fc1a9dc2a54737efcf2a505e098419a7/43518676081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=find+the+meaning+of+idiomsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000138ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x138EA 17476 bytes
SHA-256: 141d5c1aba2a80a9e5e1636a7bdf8aa553eb9fe09b3476ff336968c23fbb6aed
font_00_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10632 bytes
SHA-256: 6341b2f47d1c75b325fa739ffccd1177035d70fce0f78ff1289fb268764c979a
font_01_sfnt_off00010aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAC 18092 bytes
SHA-256: bf1c27a575679d046406a0c26acf8427be38a79b9f3fbc92a64e998fc97abf57
font_03_sfnt_off0001539a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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