Malicious PDF — malware analysis report

Static analysis result for SHA-256 95689370016c6387…

MALICIOUS

PDF

94.3 KB Created: 2021-07-13 20:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 170ff7b4f14fcc82c653a4c40636f6eb SHA-1: 00d0afa4376e3579bb89e6ce5e526b0419286fe4 SHA-256: 95689370016c6387ca59cd0b1c3a47002b69f96b4c37edbf5a4e3c52fb26397b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb7bbdc19---lodavetaxovitajezajulolan.pdf In PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a708875d769---zuxaned.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/gafofimivanixugewudemej.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/bejonak.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090564399f71---wiwenoxewomelijolitixa.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/6551527736.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/df362ef82daaaf12c5c7d2ed049ff25c/66569458978.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/pigomukaxem.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/fuxariweje.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/77798284809.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/m47kuctv21kjq60tj9rhbiu347/18744302611.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/309fd7af709f2aeb4834a927a21d9c44/lipara.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/toxedamozota.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/59108561536.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93a0b25951---62348807592.pdfIn PDF document text
    • http://asustainable.com/global/file/58567986847.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f688f0527---jexakawugapuzaleviwa.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c0935aaf9dba1b1e0772e8f4eae4a2d8/tuxudubolila.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf548f3f794---zunuma.pdfIn PDF document text
    • http://fabtur.ru/upload/files/76539935808.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/88646076064.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d8e5e64db---kijoma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=cindy+kimberly+nose+job+before+and+afterPDF link annotation
    • 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_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 11020 bytes
SHA-256: 32caef13e0f5c790aec432e01d2a6af3a72fefbc042823ab5eaa1adba35eb1c7
font_01_sfnt_off00012574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12574 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D86 18348 bytes
SHA-256: 0ffedf618984727ba5088e792aad376b5c4ec21f8a424e88a90aa4639f3d1b4b

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