Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f50123c8ea9679…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 18:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 24d4c445f63bde1a288ebd777fb6c611 SHA-1: b38090de24f419848dc096d01d76be546b3beb9a SHA-256: 22f50123c8ea9679ed2e4247551ed623460db03d76014ba872613e16c74d8a10
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially malicious content, likely for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=fios+actiontec+mi424wr+bridge+mode PDF link annotation
    • http://lnstagram-helps-contact.com/9039947847ubn62.pdfIn PDF document text
    • http://copyrighthelpptteam.com/89747495569oysj3.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/AajftS9/22593860150.pdfIn PDF document text
    • http://idealica-ordina.site/festival_of_speed_2021_datesxnyyd.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/XZJgdJO/cubia_3d_slide_puzzle_solution.pdfIn PDF document text
    • http://telgrm.site/marley_and_me_trailer_2019uok7k.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/xjj0gfy/15720725679.pdfIn PDF document text
    • http://rollernefrit.xyz/fafefujonela91li2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_fe1467e0be04427b9d31155238d4f129.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab56e10b-923b-413b-a932-fe3efcc36bba/clash_of_kings_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f5cf34-e44d-496c-bd48-edb1650abc53/nupalimesuxo.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_035cf74f4ce54afa9e479bfc684d0114.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiduro/best_wireless_earphones_for_android_2018.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_91318e30042d4cebaf4ad1c5bcabcfd5.pdf?index=trueIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_783a92ef39474cbf8c9c718bab752219.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_849890c8c8e346d5ab81e3ba5fbc58dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2ca808-8c3e-4d9d-88c9-2db1d4945b8c/43655775200.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e0033e9ea7614a4fb6911f8c7b4848b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/471dddbf-0de0-4496-9ae8-57289b2a5802/85353505988.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_aa04991a28684aba8bdf9dfa9f7253cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/the_robots_are_coming_andres_oppenheimer.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_b324371d1c8e4e51b1a801d1df2fd823.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 5632 bytes
SHA-256: 68b99afca121b1f309d0cee2f2ee3ee3a38e7b67a49cb0ce68a83d7565d24c88
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 9340 bytes
SHA-256: 41cd0d65605bbd626ad0f51ab84917781ff142a1d5d2d9716dc758d1c2131857
font_02_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 10796 bytes
SHA-256: 89f942e51d77aa7d33340a69c37d9b0345aed87f75fc0a307e925ba6cc1e3a3c

Open this report in the interactive analyzer, or submit your own file for analysis.