Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2830e4200aa2a3…

MALICIOUS

PDF

94.5 KB Created: 2021-06-28 14:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8decf7569becc296634f11e24abb2c4 SHA-1: 8228c5477338adc3823ca44f0fe96fa3efa969f3 SHA-256: bb2830e4200aa2a38b76dc3462d552c150fc6582108cf643d0eda3a7a20bbac7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and potentially malicious content. The primary purpose appears to be directing users to external, untrusted resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://aulacvn.com/upload/fck/file/33236263756.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160aec1563a4f9---tumitixapupi.pdf
    • http://aaaexpressac.com/userfiles/file/73634783970.pdf
    • http://amphorabeautyclub.com/campannas/file/92201816622.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1b97861f---93929652669.pdf
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/39762797390.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5n86bft6523e57dt9jevthifk0/11010459677.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160781ad8591f0---pimobupogakub.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160752aeeb3705---69793785204.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b780092cd---24110517419.pdf
    • https://birsamundapark.in/userfiles/files/42071781218.pdf
    • http://baovevietnam-vnss.com/upload/file/xokusegenukusa.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b4a0cd0cec4982b9cd3e82d0416eaaa7/dimiw.pdf
    • http://sugarfree-gelato.com/upload/file/fasodiforufovekede.pdf
    • http://portalkucharski.pl/app/webroot/media/files/61529048920.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a285401a02d---21535788078.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160aba079673e1---texijagi.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/blv9hj8a1rsoalrgk9alkd8g1l/jukowabupenupubota.pdf
    • http://maasmartcity.com/userfiles/file/kewavemirizik.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/5t451tr1t0tacpn28hib9f320l/batelexadebededamixul.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/674a46dcf3c505a282d2c790600e2563/54471279892.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/3f46db55ea18f2528561feeabfd18a70/negexogujoviloxeronob.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=midnight+memories+one+direction+mp3+download
    • 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_off0000efe9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 16792 bytes
font_01_sfnt_off00010800.bin
50983e38548614a44f5fe92d864097da457c300c983b81ccf96664c9ab6dd187
pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 11212 bytes
font_02_sfnt_off000121e6.bin
6412a7b8bedabc11543efa449f2eab27dd97c17eeecdd23c51730f22006c0453
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 30200 bytes
font_03_sfnt_off00015f52.bin
cd34e93fe872477054cef7ddfb0d7f7163d2aa753b90676e377c129d3ed8f93c
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F52 3064 bytes