Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e41ab47231dfae2…

MALICIOUS

PDF

132.0 KB Created: 2020-12-15 05:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35645ba8f2a9104e1ab54db3b4acaf6a SHA-1: 24e896604fab7fa1e9633f0a80326285fc717dbf SHA-256: 6e41ab47231dfae28b8b6aaeba38ca575914e221cbbe5cb624e99c0d889c2237
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link farm containing numerous external PDF links. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect the user to potentially malicious content or phishing sites, masquerading as academic resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=infocom+2020+accepted+papers PDF link annotation
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/lelipesizujuber.pdfIn PDF document text
    • https://tobosuxonekid.weebly.com/uploads/1/3/4/4/134493818/talilevesirujugin.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/997235.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/dulim-zuwunetobo-bifasijofuf-fulexir.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/7b743e64.pdfIn PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/diwebadilulov.pdfIn PDF document text
    • https://dewasujule.weebly.com/uploads/1/3/4/3/134340999/bugoxukisozonav_nokinojuguvute.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/db3029a8a4.pdfIn PDF document text
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/9174354.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://s3.amazonaws.com/ladiwuzetawedi/knife_self_defense_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/the_house_2_game_online.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/230406519.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/gigabyte_x470_aorus_ultra_gaming_bios.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
    • 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_off0001a2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2F8 5480 bytes
SHA-256: 79f06f5155a04979caf3c9b0d525f252e4b657e134e2f56734abc260c6f0105e
font_01_sfnt_off0001b57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B57D 12772 bytes
SHA-256: 1e5bafdc4f8a17da40ab5c4f4471d5c8676bdd38e544d513e6d69f2e5f3c5ff4
font_02_sfnt_off0001d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D95A 12348 bytes
SHA-256: bf4dad8aaa8be31e73788d6b12a46cd73f2ae16a03a1c417a9d504cab030a147

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