Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eed8a19b7ea13e…

MALICIOUS

PDF

73.0 KB Created: 2020-11-25 06:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ad8d23cc3aae1a38b707758efe8c77eb SHA-1: 1d913daebec887fe4fb8bb058575b9786046e937 SHA-256: 65eed8a19b7ea13e8a431b7f22bba3d391197685f941a38a31af8d2b6f33bb65
252 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to create a link farm, likely for SEO manipulation or to redirect users to malicious sites. The presence of a link to a known malicious redirector and the ML classifier's high confidence score indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=biggest+law+firms+in+nj In PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/a6fbd90d73.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/gawovu.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/besububopi_kuwuburema_wubewegovoxupup_rinesojutob.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/kafij.pdfIn PDF document text
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/texojitoxedon.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/sutonolob-taniwov.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/c727a5bcd2cde91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eefd260-47ac-4fdf-b59c-0f054eda06ea/watch_out_download_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d995d99f-c646-4b5b-b0dc-684f156b5f81/88810702848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfd76b5-c758-4ddf-a5d2-0272e44ab086/coi3_compound_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1a5642-7846-4723-97d5-58fbd1bdaa09/wewibit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ecd54-c285-47ef-9835-3894a4c261f4/wise_onion_rings_vs_funyuns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a029dae-b4ec-4727-ada3-a358e1fd368e/mewitovegatiruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af6b1f3-9d21-464c-b0de-c91ea62a102a/45557827078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce0c3e6-c2c3-4973-8b7f-45ceb2a0ac95/donu_donu_video_song_download_hd.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD46 5304 bytes
SHA-256: f38ddd97ccb8435c9de153705aa30ece82a0a73369b1069e1dc477b60304dfdc
font_01_sfnt_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 11584 bytes
SHA-256: 9ada49242327af4178f0a3cf332a57d6b4434d6fdafedd1157bf1799ff2d7e1b