Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0bc7f6800af76a…

MALICIOUS

PDF

88.9 KB Created: 2021-07-04 01:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba9007f4454e441f3259b9e4a394a157 SHA-1: c1b5d1526ae16d2f9ca895c76051fdf88f7bbac7 SHA-256: ba0bc7f6800af76a2011ecec2735c29a089e66e77706c0e495053a1ea39d91cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics strongly suggests the document's purpose is to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=oxford+english+for+life+elementary+workbook+pdf
    • https://franchiseharbor.com/files/files/monaz.pdf
    • http://chanakol.com/ckfinder/userfiles/files/99654949862.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/kcf8bpgfipjp81vshhj15h43c7/mosulovixegabupakajed.pdf
    • http://fedoro.ru/upload/file/83749623239.pdf
    • https://jmtours.co/aym_image/files/94714439164.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/0c2d3fb6d9e2cede2dcacca2e86d5466/pezisipubazerexa.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/4031f2228baf05a6fc3b14e7979662c1/65947463147.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f01458ba8f---zudawinevuzo.pdf
    • https://jpjplumbingandheating.com/FCKeditor/file/96874621982.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/eef50ogqmh46324elnnghleqsp/33652415111.pdf
    • http://ipublicity.cz/data/file/82778284242.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/tefafofusibam.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1b88b2b46ae352c956959fbaf4734810/vibarodasukigewikizipi.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210703_830DE28D9A0EE657.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b6e4c77f1---jurukuwubitesomi.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16083e45f9c628---gonotapodolanatali.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/chc32uvhftuiode52tcv9fal51/61887998393.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/u3tkdpdkojmo7e0gkcnt3sdmv0/51617231972.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d37fd6358628d3ed2e5c4d4032a14f93/lujutaxusej.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/19k1j7spdsf75n3a9k26dj9dh4/41151995242.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b645656f2ce---69157870741.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/fbaa9cce3b66af319c29b075e5fc6ecd/4824665522.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/27628c3521545dffbc160bfc23a19e53/32850049324.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/fagusali.pdf
    • http://ideas4mypool.com/userfiles/file/63626772899.pdf
    • 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_off0000e8be.bin
ad50dfd3c27e25e6551ebfd67725a19eacd4b41ca93190a5722f75f778437a45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 11504 bytes
font_01_sfnt_off00010370.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 16792 bytes
font_02_sfnt_off00011b82.bin
2df85c28c326d483b80e1d6198e074e514b3fb71a5dc0878879174c82c1ee329
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B82 23332 bytes