Malicious PDF — malware analysis report

Static analysis result for SHA-256 478f43da12938bca…

MALICIOUS

PDF

65.0 KB Created: 2021-01-17 19:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ce704f933cc11f27ff2f8d5eef0403e0 SHA-1: 700f27f681c891ce0106810810a1be7eb484ccc3 SHA-256: 478f43da12938bca1cae4b879107636835666572c3fea9d2411e5b5353c1d168
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest a phishing or malware distribution attempt, likely masquerading as a document download. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=child+development+an+illustrated+guide+birth+to+19+years+pdf In PDF document text
    • https://cdn.sqhk.co/nodewanase/CljjGoa/girl_talks_to_my_friends_but_ignores_me.pdfIn PDF document text
    • https://site-1254572.mozfiles.com/files/1254572/fusovuz.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/haYjaC0/wadele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_5fe798f6223cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5fb6b7c2cc404.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/cjdGVhg/43944729008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382407/normal_5fed7e3cf139a.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/bratstvo_crnog_bodea_kralj.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/anD26ij/amazon_kindle_account_forgot_password.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407782/normal_6002c9e9b2034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luramamelolem/73957960556.pdfIn PDF document text
    • https://s3.amazonaws.com/zopamagiguti/79936099427.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/karodenobubamufamodedop.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/koxiwosapiwifononipi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E7 5872 bytes
SHA-256: c05711b5d21655e1bd0c03e8ab5e32a20a5d7dcd5613ab57d7cb99331b68e182
font_01_sfnt_off0000c5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C7 10160 bytes
SHA-256: 44bf02aef55d8e630cd0a58dff2ab8b08595fed26886977d833deca2789f15d4
font_02_sfnt_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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