Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07e1751ff5f6fa3…

MALICIOUS

PDF

96.5 KB Created: 2021-06-29 19:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9aa5e6a14c7a5278eb6598b10ea14208 SHA-1: 510be99919cb53bc4f34080008018a74d0b00523 SHA-256: d07e1751ff5f6fa3ffb8466e0e3d515366799b81d45b578c02222a19cff71db2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9857

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://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf96569f4b---27010613769.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/527fa740b0a1a158622a2c2584123a67/xidomabegovusilepujo.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cf27d566ec9---kemamemenetazipotobos.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb5d84d31f---jokererizulogisape.pdf
    • http://fiumevivo.it/userfiles/files/48189313817.pdf
    • https://newtech-utm.pl/userfiles/file/37833341738.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f4778de80---bikofanukevagimapukemubu.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d8477f28291d6f305e2fb603676934b/kufufoxavig.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/bf2e8c928ccb74864dd86cf538dc4c40/gakukupoxabaga.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1405b2e8e178c2666f3e037126ae20fa/65533373261.pdf
    • http://goldmustang.com/files/files/bojotimadawipo.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/jg7m6u21bpqqm82ruk8iomm8p1/41684726163.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a475227aaeb---30384329759.pdf
    • http://cycling-software.com/files/file/79324189994.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0220774d---noduv.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ce94c8aa---23453834583.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c328b06462f---kenametakupefulimu.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/uunldogted5m0obnjgcr6qa1ih/luzukuvibaxoxe.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/19b0de9425dfd6166c9f5215b3fcfd01/radavubagavodaj.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e443483152---52712340103.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/c9f9347c7bb7d7bd7ceb098ea3afbe7f/zafivexak.pdf
    • https://hogies.com/includes/template/uploads/file/kiwigoru.pdf
    • http://classtool.info/upload/files/58242552910.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+does+cocinar+mean+in+spanish
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000107dc.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x107DC 18328 bytes
font_00_sfnt_off0000e1e7.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 3464 bytes
font_01_sfnt_off0000ef67.bin
c7677a88724b2b702e6419ceb270a2d91805a3a63686a36d0163e9283a11ca8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 10728 bytes
font_03_sfnt_off00012579.bin
19260ed489921e34ee97e7c89238f73cfbfa5e068a5afa3e8ad7d78479ded655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 22540 bytes
font_04_sfnt_off00015b9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9D 16792 bytes

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