Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7190fdbc9a52f34…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 02:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d4ec422692fc12e2c8c403c6407fd6b7 SHA-1: b30bcfaa71fda142180f39a2d7e76ac57fb2ed9b SHA-256: d7190fdbc9a52f3485b869b6c24b94206bbdf6bd24e8f55492cd31acca4028bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that form a link farm, with many pointing to compromised CMS uploads or disposable hosting. This suggests the document is likely a phishing lure or a mechanism to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6016f797db---damazorezewuxu.pdf In PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210825_013545.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/85729145128.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/viwosurasumoput.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7abc9192fe---pakigukatekixakiko.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/36536633524.pdfIn PDF document text
    • http://ministerium.pt/files/89048381226.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e793db0eddd---womidinafat.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/82d84jfi9nub4nt1cn6i82cf13/fapironotunipolotomekusot.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/6468340329.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/74753580048.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d2ced1d9---pezowobolomotuwamomifipo.pdfIn PDF document text
    • https://people11people.gr/uploads/File/91606739349.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/ribilozuzokazozetadakovo.pdfIn PDF document text
    • http://greenld.com/userfiles/87091522818.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/9ac97b8a8234d64feeef111cb63ff649/48021679154.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbe6093732---rijeperawirekobilom.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb2f6a05ac---befilimosafasak.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/78f0275ec3a4eba1525ec170e1f7c7d7/finiboga.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/gupamovodijusujuf.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/nudazajipogojiren.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/fobokilukimagoz.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/45098940364.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/wulalobanurapadifalozovi.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/xifemidow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=real+heaven+imagesPDF 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_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 10348 bytes
SHA-256: 7419b75f144db40401ad43274d2caa0f9b72fb1b72e99796800eddd5e5f45978
font_02_sfnt_off00011c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 16620 bytes
SHA-256: 84e9fe9dd781e57151f58f8e8930784d688b7726f16181212af2ed6166a33c8e