Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0ee7dd1c2ebeb9…

MALICIOUS

PDF

88.9 KB Created: 2021-09-03 03:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 202ad3ac118e317b68cd1ce35b6dc02b SHA-1: 797ed4ba1f5626b4b14d2891ecac6b580340108c SHA-256: 4e0ee7dd1c2ebeb9c2ad8fbcd4047b22858b357c9d92663490673378900e0af7
156 Risk Score

Malware Insights

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

The PDF file was flagged by a ML classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised WordPress sites and are structured as link farms. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c09f9a41611---jozemurifejotelab.pdf In PDF document text
    • https://liur-krd.ru/userfiles/file/30177353936.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/leditamebasif.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f866f230---robuk.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd685653b8---xifewiwufomegeporelulepo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16089993b9c49b---90338416814.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129348022959---xajikukuxowamekur.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/xamagobizar.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/25346283043.pdfIn PDF document text
    • http://kodemari.info/data/files/puvadisepigitobo.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/repumupibimukudedifuzaxex.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/mifevojisifudeb.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/74704971307.pdfIn PDF document text
    • http://zuche0551.com/upload/file/11779292952.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/jodetuneba.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5kbic7gfak63vpalqj2m058c51/52577707441.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/dodisebikexodut.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7702317a22---lokatolivoponavujuzixer.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fdd64694---tufunazej.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/duzejuwasobevavafutakevo.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/16627720753.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55dcc5701a---73961931307.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/7254521634.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c876ff3c6b7---34570555667.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/2430128897.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607541ae0db0b---61631461761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=little+tikes+3%27+trampoline+manualPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 10768 bytes
SHA-256: 357ba55b16ab25242a19e0a9aabb7757665456ce34b20c2218d7c3006cfadfcd
font_02_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 18980 bytes
SHA-256: 89bbfe35845f33246697069d9606ab75f8269e79b64555c793c4f552336da784

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