Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c490870d0d8e4b…

MALICIOUS

PDF

87.0 KB Created: 2021-07-13 21:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02b5c2f27a10145ffd51937fe6438f01 SHA-1: 6803ed0bb82d538cb5525882beee286e5e9aefe6 SHA-256: 80c490870d0d8e4becd1f5b8ae32a08efdf97326814d5996ed477ea11dedb603
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to compromised WordPress sites and disposable hosting, likely serving as a link farm to distribute further malicious content. The presence of a visual download button suggests a lure to trick users into initiating a download, which is a common tactic for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=occupational+medicine+physician
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b26c0538588---47991367385.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/01ee4a06eeaf0f2c6b8b9be2eda221ab/sepopave.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3e93df8ca---37421337533.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076743600f1a---65364615243.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/58b6fa4e39eacf38e9e2158cf117ebc7/54690605771.pdf
    • http://short-story.ru/upload/file/tomawujetage.pdf
    • http://smartpaintingplus.com/userfiles/files/13173735365.pdf
    • http://metisentry.net/ckfinder/userfiles/files/gededafivegewanopoxa.pdf
    • http://planbmedia.hufiles/17876263056.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f0d6a2ec2---376482889.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/3mdmv74ld6mrr871huknmlmcmn/jifakepego.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/54419247941.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e28c2ce08a90b75e81ea0ca7037af6a0/ginakeluvos.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3qalnbron7jtfd37mu34ituqs4/neludobupuvaxusan.pdf
    • http://optikametuje.cz/userfiles/file/23286863257.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607740aabeaa5---68397657475.pdf
    • https://pharmnet.cz/ckfiles/files/files/78187838213.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde5919ff0---torozebobituzij.pdf
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/poruvad.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/efcf879ae41a67603259ccd91a3ef535/22915709826.pdf
    • http://boek.se/bilder_umeny/File/gevuzokumaseroxapazebupun.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25c7e9ce70---diwepirufora.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853bc3b65c1---fixerivuputefesunefuta.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/5817195969.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd6.bin
f7131519f858b4f534869b3b36d10f247b6d6fe5befa653c2e1b26255abc2b90
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 10920 bytes
font_01_sfnt_off000108f4.bin
8959aa75f792f24a55e61fd93117198ad704cf3a3c53135cefc7979c40f12706
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 17632 bytes
font_02_sfnt_off000136b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136B8 16792 bytes