Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba03c1eb0661a7f…

MALICIOUS

PDF

83.8 KB Created: 2021-08-18 06:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fe6b743f976e2865a5f5a9b75521ec7f SHA-1: b03ab9630621ae480a4ac2deb6532bdcd182633e SHA-256: 9ba03c1eb0661a7f0250bda6f3e51a033a4e06264667f8e44a15c8810281231c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it functions as a lure to download further malicious content or engage in phishing. The PDF structure and link farm indicate a technique to obscure the true destination and potentially evade detection.

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 http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1e731557c---malazowa.pdf In PDF document text
    • https://poolpoint.be/uploads/file/99588144419.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/4e19731e5643f74ae41c1ed29ad2081e/xekiroj.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09de97782---malapesizuvebapuwug.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/abb5e7e58c8be32eddfb64c6e490a37f/mewujosisafisuvajizefed.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/79130706817.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/18c3226894c441eff2949f8cc672f5c7/gewumawipozefevobefabo.pdfIn PDF document text
    • http://sparkpro.lv/content/file/89922178473.pdfIn PDF document text
    • http://pvvc.cz/files/wafono.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ba4cfa8bbbc63e93b4c74299b3aacf36/fuzokilelamuva.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/torelepadibamituwisew.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210812_8F5A1BBEAC4F4B53.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/5doge2tnq38100gv6dh7l4n5hd/xobazaf.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/88777988442.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/xurib.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/zadik.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e57a4e3a---juvakujowirakufugibifo.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/xesizofonukoluwave.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/41198970305.pdfIn PDF document text
    • http://kino-cosmic.ru/sadm_files/23322804616.pdfIn PDF document text
    • https://nevisnews.com/userfiles/dajaxaselowe.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/fa11c5ae67238140754b10d2aff53ea9/didazazewidiligu.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/togoker.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/berige.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6a32e4fa415f9aa2a24b7df8bf44327e/fiwogosivijiduvuzidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=emerson+portable+ice+maker+directionsPDF 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_off0000e688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 10892 bytes
SHA-256: e4eb4cf748c52bb117971b7d0c80e1559513b2ca837beee6db4a4bd05b407a24
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 15928 bytes
SHA-256: 7f1e909be69e7ed038ba6fdf2046564a9806f761e561332a75d27b08f1d620ba
font_02_sfnt_off00012810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12810 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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