Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc73f5d97c662b2d…

MALICIOUS

PDF

79.1 KB Created: 2021-01-25 04:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b0ccf54e64c0ca5d075ba7b0a3932251 SHA-1: 98fb09319fa15da1ddf4a61699678deba61e772d SHA-256: fc73f5d97c662b2dfd4a1010ddf1bc9df785e5a1c795fac913277b993a6dd2f5
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://traffine.ru/123?utm_term=citizen+kane+viewing+guide'. The document body, though heavily obfuscated, suggests a lure related to a 'Citizen Kane viewing guide'. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or malware distribution document.

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://traffine.ru/123?utm_term=citizen+kane+viewing+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5feeeedc59304.pdfIn PDF document text
    • http://sibuvre.com/ganodadidomojaleruhwfr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466143/normal_5fce65d7f34f5.pdfIn PDF document text
    • https://cdn.sqhk.co/keserina/jTBm3ih/free_weather_radar_app_uk.pdfIn PDF document text
    • http://kopavavabigi.66ghz.com/pes_cavus_foot_deformity.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_5ff0eeb3a40fb.pdfIn PDF document text
    • http://leomannapov.com/25088032130jhj30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5fe4195f2905b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453556/normal_5ff7dab02e81c.pdfIn PDF document text
    • http://help-bluebadgecenter.com/fear_the_walking_dead_season_1_castw6d7y.pdfIn PDF document text
    • http://bapipakaroxi.22web.org/86331290486.pdfIn PDF document text
    • http://itverys.space/712812716663r88u.pdfIn PDF document text
    • http://lynciguest.com/dinosaurs_vs_aliens_comic_onlineve4uk.pdfIn PDF document text
    • http://reweder.site/kikine_name_meaningrf5rd.pdfIn PDF document text
    • http://good-production11.site/lezowesawatejobigeseposev6f04a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fee1d906e5da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robefopatobut.epizy.com/novamemijezojimaxibo.pdfIn PDF document text
    • http://zopefunexot.epizy.com/53841368635.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_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 4860 bytes
SHA-256: f9ef36e23a160b92b2a4adc6e66031000ded5b76bd231ce9d4e248e77f3c1b74
font_01_sfnt_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10472 bytes
SHA-256: fee5e19256ab990f9bcde8aedd53eff37ea8ea33c13e1259caa9a8dc13feb61c

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