Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a112f2d5dd06f2…

MALICIOUS

PDF

67.0 KB Created: 2020-12-05 18:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8c0b92cc0f604afea5c9ad5fc54557fe SHA-1: dbc9b85abca267929d41d0f5098f4acd8ffab24a SHA-256: 76a112f2d5dd06f2a50307b007fd93fb0e84e72169012d151f04afd23de12ac1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/aws?utm_term=beat+saber+ps4++code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f9bd67850687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f92328c271e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5343b239b0722914d6867/t/5fc89e516652ad59ec2d5fce/1606983249979/sea_battle_2__ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bcfb2e537a05ef083615/t/5fc0fbbb3f75b16643f719ae/1606482876631/micro_and_macro_economics_similarities.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e694085bf90c0e16c363/t/5fc78704ad3e64119249275f/1606911750116/89401416032.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe6b3c6ccf69f324c2da/1606286955688/reddit_summoners_war_rune_optimizer.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/android_10_one_ui_2_beta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc167576609fd0ee794de9f/t/5fc65b137acac6192a9b23a9/1606834964631/missing_children_georgia_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/658734d8-20a0-48ba-a45c-dd9c8c7832e3/41384096396.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc2c88df3de5e49b5c03403/1606600845595/navy_nsu_cover_regulations.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_off0000c3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FF 5312 bytes
SHA-256: b75510bc8d8efd67c00cf35c48fac0cd914d536765d4bd54da6eb8085958747e
font_01_sfnt_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 12920 bytes
SHA-256: c4f23ddb749631cd4e0126b41d74725512f150b3c028388450d40b6cb0b56f44

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