Malicious PDF — malware analysis report

Static analysis result for SHA-256 9020272f35b3ef23…

MALICIOUS

PDF

105.5 KB Created: 2021-06-29 02:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88b9b61343b6854e779988a14778c669 SHA-1: 6436cb5d4805c6aa1754275f03e5a991369452a9 SHA-256: 9020272f35b3ef23e3f1e0f2da653a350ea2b629284a1235422941766c7a49bc
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristic analysis revealed that the document functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on potentially compromised CMS platforms or disposable domains. This pattern is commonly used to distribute phishing content or redirect users to malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/romizubiwat.pdf
    • http://shophouse.info/images/files/kikukupakitadotiru.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/032d0a017307682ee28a653983b9b04c/fopimow.pdf
    • http://benevolo.it/userfiles/files/riravudawudaw.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9fa2656ad65e7536df60710ddd2bb626/nenixaxi.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/f21jtecocs9jtgkktck93hg5st/mexasoxagefamizadakuji.pdf
    • http://bajajsports.com/userfiles/file/sumejejebotal.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bcd48f7fa34da5df1dbafc4a57b815a1/24783321570.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b95af8ddba0---6233304626.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/3af387bd380cc48c85aa571d75018a15/34995111121.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a7de89337---lijenenisu.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/edd1316e8ff49eee3df5fb3ffb18a735/puxoragorobinunobunixi.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/d0ccf0d6043da0c808f3dc051549ac83/48860666310.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/6862425729.pdf
    • http://knuhpharm.kr/userfiles/file/20210623012658.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4181e5a0c7f985cf2016d1b9fab73059/xubijajog.pdf
    • https://reitinguok.lt/userfiles/file/98448759177.pdf
    • http://fitviewer.biz/files/file/41123833534.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160711b1201cea---zakizisaweripipi.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/mbpnns337mth413sidmjfnn0gn/vitosedabofirasufe.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/6jgp3582p68vtjfbf7ea6psvn0/getufaxepojugidoxiriv.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/811k3cbjmn7bfd3v8f40aujij9/wuvebevabus.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/27o2u3db76429qc1ekm7phsgk9/87371845940.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bhoot+in+tamil
    • 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
stream_005_off00017b24.bin
74cf65bf790844431c8768631e34fe1b7cdc2481508ce6467e069baa39eaad97
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17B24 18296 bytes
font_00_sfnt_off00011e42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 16792 bytes
font_01_sfnt_off00013659.bin
8fb39cb031513ddc77b88efa8be528897c12ab7bc7e20406c473190d818b1471
pdf-font-stream PDF embedded font (sfnt) at offset 0x13659 10024 bytes
font_02_sfnt_off00014c59.bin
07cf8b6925745bf66829ea98735f467760ab8bed8ce5c991058c01ef0470aff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C59 17844 bytes