Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c478c063fd0c9a…

MALICIOUS

PDF

98.3 KB Created: 2021-07-06 04:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92a8703b4266352cf2467e5b6af96857 SHA-1: c075b85fbd285838c663af697e42d9e18dcea7ff SHA-256: 74c478c063fd0c9ad7c2b31ba2b27183b2956601b114d52535a36c05d8aca87c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://meruzhankhachatryan.com/app/webroot/files/file/43398930767.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3dd3ba65aa0cb71c925e1b5b66f0c2f7/zirifesufofateval.pdf
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/61242657801.pdf
    • https://greenfuturevietnam.com/Upload/files/fupozok.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e0d6cff54---bikisebokajutirem.pdf
    • https://alakharia.com/public_html/userfiles/file/84983492084.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952c4e9a477---23491934601.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf759b6cc4---dilokiduvojizex.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/eb683587a333cf370dc1349debe45559/51229736049.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e84ff54186---juxanarapuf.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/wedibi.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f40b52c765---lusemifufoke.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/idhhqumuq1fegcc87ktohqu7ka/36699659939.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d311ff31635b953e4971632f19111966/58531779999.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/turadawesupexixudiku.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c8c28acf0a8178925ecce403cd99f9a4/kapijazamububag.pdf
    • http://augustaelectricalwork.com/editorData/file/vimude.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/nekunemikutigoxibuso.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1dcf967f37a60f5c9b281c69fad39073/jibisa.pdf
    • http://aceonlinementors.com/userfiles/file/17692522935.pdf
    • http://archi1919.com/smlclub-files/file/32711276383.pdf
    • http://trekkingsapatours.com/upload/files/tatubijonilezalip.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/j09tq9qp50m24beoatd4c4ltoh/25384879604.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983df485b4f---87108924071.pdf
    • http://fsgpj.com/upfolder/e/files/20210629062725.pdf
    • https://jahanchart.ir/data/files/file/badurimofajajufomigezanu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=minecraft+survival+house+map
    • 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_off000118cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118CD 16792 bytes
font_01_sfnt_off000130e4.bin
e160aa238f17931a03f70b861a9dda74373f07141f1f1f00e9c4bdb3a27c18b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x130E4 10904 bytes
font_02_sfnt_off000149f8.bin
3af310e7a1e143cd6a4fce5bb7c16940f9eaf88c41b271b3f862bcbf404bddb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x149F8 18276 bytes