Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d1e11bab0129ab…

MALICIOUS

PDF

73.1 KB Created: 2021-02-16 09:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5274f6e994efb5c6596005eaff81edb1 SHA-1: d23d97060b0c4d8f1ff1263e6a7bd0a7cc76cf9c SHA-256: b7d1e11bab0129ab1015a9b750fbf5f4fc25dd3fd876df4b6ac11731c6acfc07
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wb?keyword=human%20anatomy%20&%20physiology%20laboratory%20manual%20marieb%20pdf PDF link annotation
    • http://qlemelest.online/abdomen_complete_ultrasound_worksheetloxlg.pdfIn PDF document text
    • http://pimolala.22web.org/anamika_full_movie_free.pdfIn PDF document text
    • http://azorocheat6.xyz/photosynthesis_limiting_factors_worksheet_answersnrc3m.pdfIn PDF document text
    • https://zedifetizigofup.weebly.com/uploads/1/3/5/3/135393349/e08e30e.pdfIn PDF document text
    • http://study-english-04.space/15191099310xu48t.pdfIn PDF document text
    • http://wiinorama.fun/96938714843ayewi.pdfIn PDF document text
    • https://zakoponuzu.weebly.com/uploads/1/3/5/9/135992890/rodituxikuwog_wajodaro_dasuw.pdfIn PDF document text
    • https://wisevagidigo.weebly.com/uploads/1/3/0/7/130740356/43a55c4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajipesexadagon.epizy.com/casio_baby_g_ms_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/eastern_airlines_flight_401_ntsb_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/seludibafuw.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/semavujujebo.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/lomadesowax.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/colorfy_plus_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/54424791339.pdfIn PDF document text
    • http://memaxomumeto.epizy.com/80th_birthday_invitations_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/vepafimejev.pdfIn PDF document text
    • http://derekage.epizy.com/abc_in_sign_language.pdfIn PDF document text
    • http://zapopododo.rf.gd/levibadiluf.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/99193895492.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/behringer_x32_compact_manual_franais.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_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 4588 bytes
SHA-256: af0d04ba969d4b559d3569c9d160b421414e428fc87f14d66bf3327d008b5ee5
font_01_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 10628 bytes
SHA-256: d1eb979df27e933359119cb4130e8e30c574079efa6e4b832fa5f15650438a1e

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