Malicious PDF — malware analysis report

Static analysis result for SHA-256 679d770d1076769b…

MALICIOUS

PDF

77.7 KB Created: 2021-06-25 18:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 945f27933095f334bbdb23b2484721c6 SHA-1: 114f46c939a43d8d92a91aee061a2869f57bb848 SHA-256: 679d770d1076769b0ebe05792d9a791ba805605da9e8d128ceefda7f7486b5aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607ebb8317b5d---45444649671.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/vo9ldq174v9lt6aqd370go41cv/39477344183.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/9857db32af4d769c63566da1d10a5f07/68409625325.pdf
    • https://beautyyaurient.com/editor_upload/file/lolafuxefafotipojov.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c197cea1b2---40125473812.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/spdd7s0mpcv3vjscfvkesk9t06/jagegadevakelajalex.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079083c68596---62184104005.pdf
    • https://giovannicaputoboutique.com/file/41279476851.pdf
    • https://acgroupenterprise.com/userfiles/file/73278802251.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9036d895---kebimeberitilexovot.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a2213dc8---zutaz.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8245361b45---nalekezedufafetafiwexe.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dnpfn8lqt96t8qlpajgbpgijtv/23975613072.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3f094c7feea25eeaafee0202cb61f2b8/pugezutorawowavolavawev.pdf
    • http://libertyquad72.fr/userfiles/file/700457325.pdf
    • http://waelfawzy.com/userfiles/file/jolomeje.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c352b764924---73161158216.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5cd03f6d7---53948930344.pdf
    • http://kapelski.pl/userfiles/file/kofopafaxabeninow.pdf
    • https://bajrahrs.com/userfiles/file/sesigupugaxusukoko.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=past+perfect+already
    • 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_off0000c158.bin
19ba34218dc0bc572e46f5a716c06a865747c6cba03194899636c3a755f57507
pdf-font-stream PDF embedded font (sfnt) at offset 0xC158 10412 bytes
font_01_sfnt_off0000d924.bin
aab90362ea6e2c9c71f6a405bf6f6ab01f9374ca23141da74f249cfb1c3fe831
pdf-font-stream PDF embedded font (sfnt) at offset 0xD924 26856 bytes
font_02_sfnt_off00011090.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11090 16792 bytes