Malicious PDF — malware analysis report

Static analysis result for SHA-256 52976e0ce213fee5…

MALICIOUS

PDF

61.8 KB Created: 2020-12-04 10:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c377cb02ef355a8fea656a620aab8df SHA-1: 1b3064f6bcf403a5686ef2b68459decb47b548b3 SHA-256: 52976e0ce213fee513fa3557acaaab682fdb214ebb13ff48afe5853f77cbefca
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://traffking.ru/123?utm_term=a+guide+to+vocational+assessment+5th+edition'. This URL is flagged as malicious and is likely used to lure victims into a phishing scheme or download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=a+guide+to+vocational+assessment+5th+edition In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/58506104950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9055223-0f36-4a72-9d84-2358036a6930/79051893232.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd284ffbb67f096305a38e/1606232144292/tree_frog_defense_mechanisms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc779470d716e027b043af0/t/5fc8db88b0f45b2a3d300c09/1606998920346/dog_licking_screen_live_wallpaper.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe9d5687f52b6b7c161f/t/5fc137ace18c5c478e2848a0/1606498221004/olay_age_defying_cleanser.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf7d7b7a66e04eaf45f17/1606219735830/4468918579.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/32847104711.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc214ba3570fb44d14a67d0/1606554810322/putimuluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4bd436-12c4-4a86-a6d6-b2c6b1726637/indoor_volleyball_courts_near_me_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/common_interview_questions_for_electrical_engineers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50b14104edf1d779bbfda/t/5fc96da819890c408b1e7f27/1607036329038/drift_music_app_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea305d2-cc75-4d38-87e9-71fb8c0e167e/dibobu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5df9fa04221c7117d001/1606376955978/21203154510.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc9e6c0fedaa13a48657c42/1607067328962/free_anime_wikipedia_espanol.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_off0000b68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68C 5432 bytes
SHA-256: e2fa384f2f14fc6fdf1cd78985fb659a0ca0e6b7ba4f05526a23797f6e4ab763
font_01_sfnt_off0000c8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F0 9752 bytes
SHA-256: d4f3d333e139c8962cf865737916cbc82dc1a89e53430f993443e57462196ff3

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