Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fe3a19aa4c5efa…

MALICIOUS

PDF

80.7 KB Created: 2021-03-12 16:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5aa9a4b3307bd1ec820a8c96a2ad2198 SHA-1: 57a1f465055f941e1c04076685f570eaa6268060 SHA-256: a1fe3a19aa4c5efa6a821f6d3b858a26dde54b7eb7b9e2a83794a864ccde254f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to external sites, likely for malicious purposes such as credential harvesting or malware distribution.

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://golowaki.ru/123?utm_term=dark+mode+android+9+huawei PDF link annotation
    • http://zekamuwafevero.iblogger.org/email_form_bootstrap_template.pdfIn PDF document text
    • https://jekotufuwin.weebly.com/uploads/1/3/1/4/131406020/xusizuvu_pixod_tamubisej.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/QSjfxii/microsoft_video_editor_windows_10_transitions.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/dizezedexan-jumobudebuvude.pdfIn PDF document text
    • https://revivumusemob.weebly.com/uploads/1/3/5/4/135400225/xerabapesivusi_varozovebikage_wupose.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/logolatuvupo-dimefika-rokozowi.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/jinokew_wumitu_repep_domumasa.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/bizifusejufela.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/EDjjyjj/imao_in_texting.pdfIn PDF document text
    • http://wagijap.22web.org/bavupatixagimibuzu.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/jonivuxelag-zomibajul-pakewubaxapef-lamawojari.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/nagev/aqa_a_level_physics_data_sheet.pdfIn PDF document text
    • http://funasuruwet.epizy.com/71840713296.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/inverse_functions_identifying_pairs_worksheet_answers.pdfIn PDF document text
    • http://pafapijeneradab.rf.gd/5680566169.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/jotalazoxewaxenumi.pdfIn PDF document text
    • http://nafaloputazesoj.rf.gd/butaxesipeseforun.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/worksheet_in_periodic_table_of_elements.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_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 4968 bytes
SHA-256: 7f009728cd88fdcb38ea7c7366f23d9ede534f30d928fee70a75eadabece4586
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 12164 bytes
SHA-256: 5470622715807d0dbdba634bdd9e7c0af9aaf5b4f7d434027ed89e20e1cd20ee
font_02_sfnt_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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