Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02798b5dcded134…

MALICIOUS

PDF

90.2 KB Created: 2021-07-14 00:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af576cb1f58c17e5e2720d8abcf733bd SHA-1: 300be37d3ac16b6a99f8e3595708ee8acd583224 SHA-256: f02798b5dcded1349c5d3e1bcc5bc85a020dd5a205b8a7042a00eedd795b934d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to multiple compromised CMS upload directories and disposable hosting sites. These links likely lead to further malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://katyababash.com/images/uploads/file/ladodesekan.pdf
    • http://www.pattyn360.com/upload/forum/files/95973173461.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/e9d03d09342ba94ca364378859d7c5b0/62448642646.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfbd113780---gotoramojodoliwe.pdf
    • http://goteneplast.se/files/images/file/54649957038.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/a6699e602333040c9a58606efb12a5d5/9183613888.pdf
    • http://guides2alpes.org/uploads/file/tukaxolavelepijutidorarer.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62efa2b8bd---lopajoludumiwi.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a2dedf93a---39617509788.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c370a9373a1---62072148405.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160819d5780317---peseked.pdf
    • http://singer-island-condos.com/userfiles/files/ratasujabafelozeb.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07a24e4912---nawesavitexe.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e97bf27777a---36389104356.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/resemar.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/aeeb6af363419e8adba5dd7908f417cf/gulekodifipini.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/20644834413.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080db284addb---gifak.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/5257114217.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3q17ljtipjma2q58qp5oap2uac/85506267244.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/95069826036.pdf
    • http://grubstreet.ca/ckfinder/userfiles/files/38848761563.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ff6b93615---66139549449.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/rstinfs2lhkl9qtm4v5n37lja7/fiwedaguri.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e44de8a4807e49561632da650f68fa97/jamukawawabotidebisez.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/b5e5ae094fa6ddbfd4fba91661758f4a/mugoteramijid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=1st+2nd+3rd+4th+industrial+revolution
    • 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_off0000fb3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 16792 bytes
font_01_sfnt_off00011352.bin
478a7c05d092b557f956da95b42fec6b8d163388c7bfdb88fd40355bc3b910f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 10836 bytes
font_02_sfnt_off00012c62.bin
8f4740464f2b35e583e588e391967fc813b312d820e8f04ed8be488dbe8d72aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C62 17380 bytes