Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2253e42ed657939…

MALICIOUS

PDF

99.9 KB Created: 2021-07-02 20:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d222efffe0c8c8a81bad608fc0d736ab SHA-1: b6a944919e1e3c461519070559858eaeb8408aee SHA-256: f2253e42ed657939295013ca55a76e5fc420341c35848c8414e258eb4c18b4a2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and numerous external links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://dubaimotorcycletours.com/uploaded_images/files/29713838031.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac59c3b9277---gisemumaregubiwaxumu.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/dedekov.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6ad976ae23b5f960f93d740ddca7938e/xudevulol.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847ed51aa6b---rebolavufawumafavipubusim.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/i919fj7li77guq28tkp5lfkg7s/40297473365.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16095db4ac4065---wuzazarikuvozuxos.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7123546f---puwigifizegona.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/8390370661.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/27734605745.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cdaa396c6---38411834295.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/foninimeveguvu.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077254c9bb78---83632724675.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a19ebefbc4d9a397386d683a4a7ec6f5/24948455165.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/r1ljr9leoj0ae0ohqd3mp75m2f/rilejupuwafosiperobumiz.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r3gjvm2o6o7pshk9c14nh66jrn/jijipafegibenide.pdf
    • https://aadharshilaschool.org/userfiles/file/4983701614.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160776ed40ea72---85743683086.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ce73db1b7---mezefematodeluvafedijelo.pdf
    • https://actor-conseil.com/files/file/wegemomunolatar.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607db4681e90a---xigudipelopiwojepulura.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b7535deff66df63941e85733b7e5cf81/kewaxudaxa.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae94764e7---52533890555.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/88072c8b79daeeb7d3e492764a2eecd5/52618473777.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160958846810b0---lonenizipumodixome.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/8ev74k2r4ltqoofptra9jpioi3/xejabureginekidokokibube.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=impact+of+climate+change+on+forest+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_off000122df.bin
e020b5032f5df90b8f1cb0a20a1d04adf23009ff1a6c46fd191ecb2dda4e5420
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DF 16884 bytes
font_01_sfnt_off00014edf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDF 16792 bytes
font_02_sfnt_off000166f6.bin
49f11f8941f1593aa8a96f974318bfd25df11a12ba49733956545f98e41b60a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x166F6 11016 bytes