Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74ba87e3ee93d0d…

MALICIOUS

PDF

84.8 KB Created: 2021-02-07 06:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d4a1432ca635be8b470049958b5cf51d SHA-1: 63064eb90d572fcd0f3740e6ada76c085f05b4fa SHA-256: f74ba87e3ee93d0d36369b1641abf7929e0c4b346fcfb3cf7201d2506072292d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=mr+rogers+characters+lady+aberlin'. This indicates the document's primary purpose is to lure the user to a potentially harmful external resource. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing and a Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/123?utm_term=mr+rogers+characters+lady+aberlin In PDF document text
    • https://cdn.sqhk.co/vopunokapire/dRcYTbg/party_in_the_usa_carpool_karaoke.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/passport_renewal_form_ds_82_fees.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/5rjj1hh/57863398041.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/zicnWoI/online_marketing_strategies_philippines.pdfIn PDF document text
    • http://apparentlyopt.com/theories_of_performance_elizabeth_bekbn5e.pdfIn PDF document text
    • http://nickned.me/847854476236y91w.pdfIn PDF document text
    • http://fafaviga.iblogger.org/23055857282.pdfIn PDF document text
    • http://loveantravel.xyz/luponiwatonimurujugi2iw0x.pdfIn PDF document text
    • https://cdn.sqhk.co/puwonereb/XXJYjhm/45587723274.pdfIn PDF document text
    • http://copyrightnotices-form.com/stylistic_devices_downloadmrq62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bideliv.rf.gd/datastax_cassandra_java_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/torozaxu.pdfIn PDF document text
    • http://sonituzesubilit.epizy.com/52002437975.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/68666242920.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/19653372368.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/arya_2_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/where_to_buy_formal_dresses_sydney.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/arbeitszeitgesetz_juris.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/atualizar_android_samsung_j1.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_off00010f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F66 5448 bytes
SHA-256: 0009689844afe8d6f9bbcabe0a040037b6dcd952d9ffc3cbc09e6489fe19b1a5
font_01_sfnt_off000121fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FA 10512 bytes
SHA-256: 59c4997d9181e4cb76455e8e25a6b0a151932e42d93764b71ea7ecc59bc20b60

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