Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2602f6f32f755c…

MALICIOUS

PDF

115.5 KB Created: 2021-09-01 03:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4bc7bb722a8c16b0fbbc52600d1017ac SHA-1: ce5342e893a78b48f0b68909d62c2ddd011a7cf9 SHA-256: 8f2602f6f32f755c7d6cd7acec54bb29dc90a0fa74150ea9d1b754f6a0c45cac
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially to drive traffic or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=how+to+start+a+vehicle+warehouse+gta+5 PDF link annotation
    • https://adasms.fr/userfiles/file/gujaziwasekibo.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/51160958615.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/93880148719.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/3e6efce3889f32aac2ff56040642e157/34668184554.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f332d9ad1---86915398635.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/zusezapunovisapasiboz.pdfIn PDF document text
    • http://parfumland.sk/upl/tetenimuparaduxujonidazo.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/lukokasonawobetito.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01b8dd5468---kefirago.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9537019ea---36354563454.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/67cl3jqvuil896urq2ul1d27lc/18671571528.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/o284ivq099e8tf60veokqms13e/fogijanuwifomotaritaxuruv.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/57126477462.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b81b609e872---83707057713.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/23803662099.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/f6f9eaed41c468d2ca95085fe642e114/42446848599.pdfIn PDF document text
    • https://sambelteri.com/contents//files/43823228551.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/70132659989.pdfIn PDF document text
    • http://rotang.net/userfiles/file/xoralonef.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/babcc7cf46adf6ac1c949ee70f9369e3/ronevamizesugodotilexoziv.pdfIn PDF document text
    • http://zaiger.ru/img/file/fubutogowala.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/9d6640d1d120a7b3a6ba4cbc7af3de3b/98277935020.pdfIn PDF document text
    • https://longhoang.vn/upload/files/xumugadazuxanuweg.pdfIn PDF document text
    • https://melz-feu.ru/upload/fanofaneridemexi.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857d4331a1a---2310807606.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0B 18996 bytes
SHA-256: 9df0524fd1e573c916478142d3572c3996ab0107bcd876a81e76876b401535e2
font_01_sfnt_off00018e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A67A 10784 bytes
SHA-256: d5d4d68693aa195adb57bf123c89a74321b9c5fe66eb7a3e5cdb21d91bfbf1d4

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