Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fecce8e5c267ec3…

MALICIOUS

PDF

83.2 KB Created: 2021-06-25 20:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 700f9a609a1a1bde6496bec5e1fb79e9 SHA-1: fbee6c6f346e5bf35e010d5d7301fee49dd2560b SHA-256: 0fecce8e5c267ec3194a8023cd73c52d90b712ce737910c81beb962b6928f583
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=pseudo+1st+order+reaction+definition
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/659655835a0fee74c15b6edfb188519c/xutifaxigu.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d48c587cf1---74855791468.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e662a4d17b---nukemanuxaloterejagu.pdf
    • https://foundryindia.org/userfiles/file/14858433882.pdf
    • https://ultralloy.net/upload/files/fotelusipemebarapufija.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b010560ec96---26433224667.pdf
    • http://wjvanderheidedienstverlening.nl/uploads/file/zudabuxaku.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/t3dc2o9b27ua28uh8fgjd8m8kc/fumebetowumoti.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f01365811---49190471550.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3a48989de274a02ca115fe584ab25f5/74092201802.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/t7rk1vh5bkivlu6o2k2e1e376s/lizusu.pdf
    • http://absolutelyneon.com/userfiles/file/6168961888.pdf
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/41505458218.pdf
    • https://italvaping.com/file/xibekawijelaxeputugevevuj.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/xanidizobukusitifemo.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16093b27873e09---56792449396.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829ad1b0de8---pikezela.pdf
    • https://brianhigbielaw.com/UserFiles/file/sowabonawoxiwawim.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/6d969qr8u84a0iuj8hv432ef2d/remisoviwapiros.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/447d534a1ec7bf79bbcb741013e9813e/lujatepowazimuxitelekotef.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/02983cb429d3fddee350fc6e1dbf6311/gapedu.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kiwemuje.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082798add1c5---1057384340.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb41917d62---mijefisorokinabibejuzoke.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_off0000e0dd.bin
c26bbfff7f4ce722a63ae2096cdee0a4e0ddd3de51c5179cdff9b4fc9cd512b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 17488 bytes
font_01_sfnt_off00010f05.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F05 16792 bytes
font_02_sfnt_off0001271c.bin
d553f5f66c88e8a4a68da64cf7bbe63bad179d5112e422cd921f1141aab074be
pdf-font-stream PDF embedded font (sfnt) at offset 0x1271C 10576 bytes