PDF malware analysis — malicious · d1f0e44d9b72dce9

MALICIOUS

PDF

71.4 KB Created: 2021-09-12 05:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 5c296a01b623a561654d67c6e2bf7f87 SHA-1: 19eab22b8ee3162bac8c9aff9da4e24baa8dcba0 SHA-256: d1f0e44d9b72dce97cd5955293ac279b21f40fec23b8184f91af2136030ebeaa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to lure users to malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/pi9j2nfll79te63ke062b018pt/8224372712.pdf In PDF document text
- http://ventmetal.ru/userfiles/files/53743365282.pdfIn PDF document text
- http://dongsimkindergarten.com/upload/files/33906748570.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/lexorenorowulo.pdfIn PDF document text
- http://sarljarry.com/userfiles/file/sokojewafipalaxoxifatefi.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ll42dpll5t85m35u96qvcuo9gc/44413802443.pdfIn PDF document text
- http://kpdb.org/userfiles/files/75097125598.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/34918840904.pdfIn PDF document text
- https://luatkhangthai.vn/upload/fck/file/ponorubadoj.pdfIn PDF document text
- http://daimarconstrucciones.com/images/admin/file/foxesuxinawi.pdfIn PDF document text
- http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631358339.pdfIn PDF document text
- http://ekonopuntos.com/campannas/file/60166698531.pdfIn PDF document text
- https://gretajensen.com/ckfinder/userfiles/files/13341970751.pdfIn PDF document text
- https://mccartha-cobb.com/userfiles/files/wunimujabebopani.pdfIn PDF document text
- https://balarampurblock.in/ckfinder/userfiles/files/vakipadepixizi.pdfIn PDF document text
- http://linyuepharm.com/upload/files/jotudoligasizujesuponijef.pdfIn PDF document text
- http://goldenbaycruisesagent.com/userfiles/file/74394987779.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fb58b4ec3---wuzumanimobovag.pdfIn PDF document text
- https://weborder.cloud/userfiles/file///vufonenufoweba.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161374bc97886e---99643574019.pdfIn PDF document text
- http://energy-labels.nl/userfiles/file/18345667713.pdfIn PDF document text
- http://henghuitong.com/jingkelun/userfiles/files/20210911022018.pdfIn PDF document text
- http://rw-hse-businessconsulting.de/userfiles/file/41840687519.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3ea1b34edec5e0b503a568c557e063b1/60883492122.pdfIn PDF document text
- https://learningsolution.ca/userfiles/files/91638577321.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=best+app+for+wifi+hacking+without+rootPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b743.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB743	11044 bytes
SHA-256: `32a0cd473d246b3ff379d9cd8bd3a7a65fc12dcd69ebb171e66e4949925a02a3`
`font_01_sfnt_off0000d111.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD111	15180 bytes
SHA-256: `09bcf3af1c1c66bda54273cb19f9701d8602a1bed1daae7813a3e53a3fcc8cab`
`font_02_sfnt_off0000f763.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF763	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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