Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfec210dced54572…

MALICIOUS

PDF

132.5 KB Created: 2021-07-04 05:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 520e9f151ccc1a96356e1a71ef1c9066 SHA-1: 7ad1292ac60b97609c0be18c36d74d7e6224c5cf SHA-256: dfec210dced54572506c79ac91097a110cc7681cce5dc028780b13342c582578
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm on compromised WordPress sites suggests an attempt to direct users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable binary data, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f86a05a3e---mexumusaf.pdf
    • http://boxshop.mn/userfiles/files/jipumu.pdf
    • http://elskenecologie.nl/files/53026300622.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097774f22f94---7962698950.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/c94b470360ebf7fa26038d982794b828/78682019771.pdf
    • http://zjqzzx.com/uploadfile/file/2021052717535673499.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96bb59a547---95682929691.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69ba49036---44580235380.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/7iu3b7guvntc42pitua13399vs/64168041940.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fadufovariw.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd20450c94---57894011473.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/qp9dtmger4v1nssp2hhagua9cb/50551486599.pdf
    • http://onlineexpert.in/userfiles/file/vegoxolevavifofota.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/j8eldjfs19fe45u8aq7lotghsl/96287319786.pdf
    • http://schnauzermountainminiatures.com/clients/17729/File/86855405704.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073d12f52b1e---medugod.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b01699f06e8---19729905974.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8571d8a478---kurojamebaxifu.pdf
    • http://taiwanquinoafamily.com/shopadmin/upload/files/fusetipuresut.pdf
    • https://facade-metal.ch/ckfinder/userfiles/files/safoxuwezutu.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608746e90b27c---80367173236.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5q4k9k10o1gmnafglsafmv6kt7/48977933695.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/d8jneubi8gjfhv3p1c3igm1ed2/faxalelireko.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4nv8ejo6dm2c3ltineoj2kt5q3/tagirukupofewokoxebiroxof.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/tomajetusojojapovozume.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hebrew+meaning+of+333
    • 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
font_00_sfnt_off000185d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185D4 16792 bytes
font_01_sfnt_off00019de5.bin
d097b5a55afad1fb50621b4f3390b62cf63ebac42480f62438a49663f28cb9c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE5 18356 bytes
font_02_sfnt_off0001bb70.bin
ea11f17722d090d9d176de4b615d8eff793e533c8a940e179f64a0f7be92964c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB70 17908 bytes
font_03_sfnt_off0001ead9.bin
3d511c0acffe0500699c006465d9bf6e7fba689678e23eb8e415c42b02b13698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAD9 10632 bytes

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