Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaf49e7e5be312b…

MALICIOUS

PDF

106.7 KB Created: 2021-07-07 02:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 634f71ba91b905989ba8508261a5a7f3 SHA-1: 6a353e1b8bc0004ffd735aab0a3791011e614e37 SHA-256: abaf49e7e5be312b97134e17c9464f617543f3200a300609001444985ab3f7c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload locations, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and links indicates a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2089937d19---98878643887.pdf
    • http://asfalon.com/__files/file/nigejiwi.pdf
    • http://biomassasia.net/data_ed/userfiles/file/40444133161.pdf
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/42547477432.pdf
    • http://naturallabs.de/userfiles/file/45125038203.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/85d18b5ff44a8616a9fc8f930738d543/vufozugalewoxolegot.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d0ed99eb60e6414819da30d384d2ce71/wenomamijojuxexamelan.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f48d35c2c5df332647b3cbdaf4848db2/kiwogupeladuwejikenuvesu.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eeace6e04---38854990991.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/defcd93291647c79d72f67064d588d50/xarumutafetonofitunu.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/968jnq7gjcn8598m801r474ld0/tetax.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/4640875482.pdf
    • http://argyleliquidations.com/userfiles/files/bujozeguvavowadajenizeg.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a240d2ec3869c91db2e0f7796d8add13/tajotorowunoloduzu.pdf
    • https://artasedanasingaraja.com/uploadfck/file/89528146018.pdf
    • http://guchenes.com/d/files/puwuvafugejeraz.pdf
    • https://gikguamerica.com/userfiles/file/49400413206.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/33cbdc2d30dddff00044c0a7396b1781/gowovujanuxivi.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/24151f9b8fa03409329e3ce62c88a920/zizevazukobuvowebax.pdf
    • http://anthonyvienna.com/sites/default/files/file/39243449184.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a1042bbc9---31852804086.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/dfbae4f68b03fb91dbfab2ee1dda78c6/nupajukefejuvidewowu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=not+that+one
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129e3.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 16140 bytes
font_01_sfnt_off00013f5b.bin
396d0adb43c68a32e518180f269d7c79ff29e626311d099511a775f92cccf159
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5B 18544 bytes
font_02_sfnt_off00016eba.bin
537ed39020590da20e6db11878cb82eca899ce62a81da4fc8bb7a35a5975422c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBA 9776 bytes
font_03_sfnt_off00018413.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18413 16792 bytes