Malicious PDF — malware analysis report

Static analysis result for SHA-256 69679236c9553b0a…

MALICIOUS

PDF

94.9 KB Created: 2021-08-20 18:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a03b135c09b9082c88bb72d0dbc8a8c1 SHA-1: e17d38fea8ceb91a60b66adc547123c87d7372bd SHA-256: 69679236c9553b0a5d04905a89b43a9586f77e5a23475a0d4220589fc56661c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a link farm designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://allytemp.ru/uplcv?utm_term=fazail+e+amaal+online+in+roman+english+urdu PDF link annotation
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d646426da54---41462182229.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/4e84e584b66daaaa2ed1916d908b5dce/64465196580.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/9745383129.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/durefivozowixideperakaru.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161145817a4b44---ruvuja.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/litadi.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ksq67q7unvtu66abm7nom601u6/tirojozolodutezupaporafe.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bcp4r5vjsd0d98ff3rfm41sbe4/gepawevesaratosejetufi.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/49892653548.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0c8cf5a746d44f373b3a7b8aeaf1e7fe/57954903499.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/93828571842.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc9a9a53ad---63056718698.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/fotodiwuzulukebakewi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dc729db00---wemefatiliditasex.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa203748057---sakibijopofigi.pdfIn PDF document text
    • http://sy-smile.com/upload/files/28150907037.pdfIn PDF document text
    • http://sireny.net/share/files/bebebugaruxiw.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45ea9b72b9---nijeridutebizo.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607054395309b---zazezites.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609dc9861f874---gofuvafugaserosufuvifupi.pdfIn PDF document text
    • http://3q1p.com/upload/file/210730203526620376e9fdhvhajpeg.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/40377448721.pdfIn PDF document text
    • https://marigabung.com/contents//files/xemututizujuxapegov.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/9685828fd232e59d1111f13f3cbc4a70/40784568117.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011632.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11632 21496 bytes
SHA-256: 2f66d96f99b9d1fb8b85704aa53ec62d352cb68a2ab2701228d3158b7bee8c14
font_00_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 18524 bytes
SHA-256: 543dc157b1ca93b45bd8f568b27b23aafd4c25c4122fa85353c365a17603ca41
font_02_sfnt_off00013b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B08 10732 bytes
SHA-256: cf2a91ae3d559d9826657c668b1b10899209e8986ab9a4b46ee41b0dc0b54c7a
font_03_sfnt_off0001533d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1533D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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