Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57b5e80bd4d9b92…

MALICIOUS

PDF

82.1 KB Created: 2021-03-15 03:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6b4f63b631cc67c79c3d91199b60e25d SHA-1: 81af7742a20ba42e7c0cfe50e9d3f19854839fdb SHA-256: d57b5e80bd4d9b924267ff107333cd8ee490a97b758a189b73bb4820b2dd8752
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=woodcock+johnson+iii+diagnostic+reading+battery PDF link annotation
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/vowiwamipe-vanoguvox-wesazolo.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/jugudaguvujex.pdfIn PDF document text
    • https://tegimawemax.weebly.com/uploads/1/3/1/3/131383609/josuzalorato.pdfIn PDF document text
    • https://paxuxitusokewu.weebly.com/uploads/1/3/1/3/131380341/ab196b8712.pdfIn PDF document text
    • https://wunopavowar.weebly.com/uploads/1/3/4/6/134660490/0f3d50bb3511ff4.pdfIn PDF document text
    • https://nanowoduz.weebly.com/uploads/1/3/1/4/131414019/46a66c2292a7.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/9063358.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/b595866d-03d4-49be-bbfa-550180aa4450/27978661152.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/sedimentation_and_decantation_worksheet.pdfIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_4b891bfbb0484423b4ab1a5ec11409a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a82081-94fb-4afc-843d-59603176cb53/read_re_zero_arc_4_light_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea22a995-5f02-4db3-921d-639cff77206c/best_rated_vent_free_gas_logs.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/burning_patch_of_skin_on_hands.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/ikea_aubonne_catalogue_2020.pdfIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_d4584867760f4314890702f769fee396.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/call_of_duty_modern_warfare_3_hacks_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/arabic_keyboard_free_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3079f3fa-6c4a-4cbd-8c0d-26037f625935/best_safety_razor_and_brush_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/fimexibizopipifeburebo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/fonugizuvafazatixim.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_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 5564 bytes
SHA-256: bc2d110d6c1650f27446edd503f1bcb80781c9c57f5e174bd98c813f960ca7c5
font_01_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 11340 bytes
SHA-256: 99e248eaae70561ab12973526f36a942f5a018362e1ecb8641925ea907a19255

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