Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c0cfdc6ff739e5…

MALICIOUS

PDF

84.4 KB Created: 2021-03-15 14:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1bec2525bb50acdb976789c20851d09f SHA-1: b1d1b66e9650515cdd69c968c18ac5d049f050f6 SHA-256: 18c0cfdc6ff739e5906394f27c2b80111131ebb8548855cea80d801c34e8b661
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous external URLs, including one that appears to be a search result for 'time warner cable plano tx'. The presence of multiple external links suggests an attempt to drive traffic to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/wix?keyword=time+warner+cable+plano+tx PDF link annotation
    • http://makelemeg.mygamesonline.org/89205422449.pdfIn PDF document text
    • http://mirror-x.org/how_to_make_brisket_slow_cooker5q8w3.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/how_to_play_company_of_heroes_2_lan.pdfIn PDF document text
    • http://cetakchantek.com/236960019524xech.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/45903140461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c8f8377619d44fd688f9ad17507ba6fb.pdf?index=trueIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_0d3843504fb14dba9f6d3583571842dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/733c5a96-02c2-43c9-995a-11c32e9d310e/suwisot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6619295a-e141-43a9-8ce6-f44776eeee13/couch_to_5k_treadmill_plan.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_344cb8f13f954b0eb07f3015332b80be.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_7ee77f439463478a8510df9684c3087a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51275b5-4ae9-4f5f-8cb3-5499431d759c/dojixuzokamowafuguvokab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf28442-43b1-41a1-ba13-492d98472db3/25480646139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473bcfd2-6157-4a31-8d49-b267e56b3a7b/19588386796.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/how_do_i_return_to_sender_australia_post.pdfIn PDF document text
    • https://00e6f838-d17c-4130-b616-1adf5f4d9bb3.filesusr.com/ugd/714321_ad0f4e68abc04d35bf69096e19fddc5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44617a0d-fdf8-45d1-a04d-22d8e9dbd1de/the_gospel_of_wealth_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a113d1a6-2536-4b54-a2df-c1b1f7129f86/disney_world_park_hours_december_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04680dbe-fe19-4210-a73c-fb60cbe4abca/java_8_features.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_d2553454da454609ae3d632354a48966.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_f5285e7544a049e7ac571fdb62eb4ab0.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_e08c8f782f1847d09f409daf5b327105.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 5148 bytes
SHA-256: 522ee9d838a885b70ed12f74c184043ddda4c81aa2ade3ca54c2c9278cdd515b
font_01_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 11412 bytes
SHA-256: df3f539406e501fd792e515cdc372106be7b0a9ce427608c39d1b7140b7c0336