Malicious PDF — malware analysis report

Static analysis result for SHA-256 243c1dfde6f62a81…

MALICIOUS

PDF

70.0 KB Created: 2021-01-26 03:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6fd04ce8a40b92a94c0251f15db6d182 SHA-1: 88efa151708f0c55147a83363bd23fe5b7b6010f SHA-256: 243c1dfde6f62a8191cc5734014c3b6f9823e996a98aa4feec0ae1919cff8adc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/123?utm_term=what+a+beautiful+name+christafari+chords'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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://traffmen.ru/123?utm_term=what+a+beautiful+name+christafari+chords In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480393/normal_5fc70ef63c54a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5fca102ea10dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5fcd35a0e10ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fef3c7ad3e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416789/normal_5fe1a7b56b234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497095/normal_5fecf6a4453b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_5fe745b6b563c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5fe83a551ffb3.pdfIn PDF document text
    • https://cdn.sqhk.co/xomifinetepi/uGgfjiS/66415780532.pdfIn PDF document text
    • http://sebemigon.66ghz.com/mejajigugadenefapiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://deketinak.rf.gd/42199964965.pdfIn PDF document text
    • http://femejedad.epizy.com/60127353167.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/november_2019_template_calendar.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/nanuxukujixoginuwal.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/vifiwefepuwakaselokom.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/hold_my_hand_forever_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/ocr_oxford_biology_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/brahms_hungarian_dance_no_1_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/the_marine_hymn_sheet_music_free.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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5416 bytes
SHA-256: a76eb41714c6cc4dba8e0fd783d10b0bf4dc113385c0978bafa4df6db9909e48
font_01_sfnt_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 10592 bytes
SHA-256: 6818557c9a350e2d33a5b98bf6a4d65fd68660bbd2676252a3a4175263f3474f

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