Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d06718a8c8188dc…

MALICIOUS

PDF

71.1 KB Created: 2021-02-25 00:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 43326f0acb6a79dcb15cf0a40b8f0612 SHA-1: ec4aa50661bf7a15cb832ee07386af2624d92fc2 SHA-256: 7d06718a8c8188dcae62a40ae3b40e33e4c31e79a00049f979c12f278e11bd88
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirectors and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely leveraging embedded JavaScript for obfuscation or execution.

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=verb+to+be+exercises+pdf+british+council In PDF document text
    • https://cdn.sqhk.co/fumamimed/jcjecZk/phase_10_card_game_online_free_download.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/litexozefibaweroxa.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/xikolosadifepozu.pdfIn PDF document text
    • http://axecheat8.xyz/jaan_cartoon_title_song_video31g4g.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/xifafigid-pejarelefavuxib-mukitunajusaw-vofuwizido.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/hlghheo/business_plan_application_sample.pdfIn PDF document text
    • https://fibupodofakakov.weebly.com/uploads/1/3/4/4/134496100/49a4cdb7ae9cf.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/swigOin/bovem.pdfIn PDF document text
    • https://wodirukuz.weebly.com/uploads/1/3/5/3/135398055/4e5318d5cbb6b3.pdfIn PDF document text
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/pigedulegemumami.pdfIn PDF document text
    • https://jelaxatibepa.weebly.com/uploads/1/3/2/6/132681396/jidatafim_pubomif_gefakelupikezo.pdfIn PDF document text
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/tarikoro-fukigi-kimer.pdfIn PDF document text
    • https://bilewemebit.weebly.com/uploads/1/3/5/9/135964156/puvuwisipaxaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/lavilijomowinowi.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/bk_precision_878_lcr_meter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/ketidapawejigerivuzeja.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/cabela_s_alaskan_guide_cooler_vs_yeti.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/biozone_biology_for_ngss_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/28996395945.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 5088 bytes
SHA-256: fe97a1d1f03301ceec2b7776744fb76a9bb5055e6959874b1b83f3e1fd96be30
font_01_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 9656 bytes
SHA-256: 0158e679d6d6f2a7bd19ef3b9f77db9927e0dd7a3ec22fae7d334158b71435c0
font_02_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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