Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeea1f2ca84f01a…

MALICIOUS

PDF

84.4 KB Created: 2021-07-01 21:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57c944a24d0ac3191a0d73a6bd042dde SHA-1: dbd50e011e5db5050cbc35b4fb9dba45a22b7d58 SHA-256: 4eeea1f2ca84f01a09ebc476fd1be0105b168eb4c17574523de13641108fa5f4
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. It also features numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded JavaScript indicates potential for executing malicious code within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d59444df44---vezubokitewipuzirufupowet.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd5607c80c---judawejanugep.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/bde6b5bc75ccdd4227647216f3ec04d1/bebifozafakoxutamerob.pdf
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/1957521782.pdf
    • http://sgd42.ru/userfiles/file/55540471854.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/861lnsuhkl353eudv6vc7q6igj/tizonax.pdf
    • http://kaithompson.com/userfiles/file/55080617905.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25149f2f3f---ximurezafizupegix.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/52416250221.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3a68628d7b592a444137e8fd08d951bc/71970077353.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/003dad0011b9947a75d1921efcdbc2e4/93922695185.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607060ad73c41---16039879267.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c349f01f01---midabazotewifiwokus.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609db99c78210---gavolirasezudodabi.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/adac8af4a6b715abe92ccbc1057859d1/jasunosenalasojuriturodi.pdf
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/59477475735.pdf
    • https://liniagdanskzydowo.pl/files/11699098772.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/2otd2331qf6m4geq66qlopo9h2/85922041536.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/2c7034f871748ae25d9bb7208193a844/81133766428.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090053d4a822---fosofovebilujaredopovuwoz.pdf
    • https://efficimm.fr/userfiles/files/35452864567.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/a7f5784cab3fd97c30887ada73a1e1e1/wosigotisoxagojit.pdf
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/9936141839.pdf
    • https://tomas-music.com/contents//files/16977687936.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=windows+10+download+32+bit+for+pc+free+full+version
    • 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_off0000e4f7.bin
692fcfc31a970df071404216c4f7cc9c0943d6534d7af695d42dd9b401e045ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 11464 bytes
font_01_sfnt_off0001001b.bin
7461223a4721873c9f29dcef4ef2fe084854f33e48db227fd4d7166550bbb0d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 16720 bytes
font_02_sfnt_off00012bee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 16792 bytes