Malicious PDF — malware analysis report

Static analysis result for SHA-256 56aa61dcd9e2c1e3…

MALICIOUS

PDF

85.5 KB Created: 2020-12-20 21:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c8d3532cb36d2a0ce739c72fc0a01d2 SHA-1: 168551f4fb532fa8d22e9bbb4c8e492480819e22 SHA-256: 56aa61dcd9e2c1e36f7daf842b97633c52303f56949b28901623a103929e3713
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/strik?utm_term=black+clover+langris+x+reader+lemon'. This URL is known to host malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/strik?utm_term=black+clover+langris+x+reader+lemon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8c4e98647ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483591/normal_5fac1e6fb1f6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5f9fcbfde8793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414358/normal_5fdeba619e0ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5fc7e878063e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8c2ade4f2f3.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/varolexexus/minecraft_1.13.1_google_sites_download_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6453512facd59ced19c35/t/5fcf6aae76f3eb1a46e3b488/1607428784066/58965494984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f0f42b-e4ec-453b-ab9b-31685ac01936/21329435143.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce04a03775b77c105df4b7/t/5fd6a3563ebe0416316a46b4/1607902039441/40567913333.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF7 4068 bytes
SHA-256: f1c5abcdceed79c51895c935cf69d4c4db27a8198041e6d5e98acacfe3d60787
font_01_sfnt_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 5208 bytes
SHA-256: 4d7285adfd5b68704caa226f1445a02d54b9ec88df4d6197510674ac6f317c02
font_02_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 4788 bytes
SHA-256: f0a15388e7e6b2eacb069689e471c5ba893031f22d697f41db048f49b81dbf9a
font_03_sfnt_off0000fb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 11268 bytes
SHA-256: da08c5374c8ab23655ae3c531199cf57a2585d94c5378be1435a71bb5fa2712a
font_04_sfnt_off00012154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12154 17232 bytes
SHA-256: 8e32832ba73df49e202759ebf4aa4bfd7b8f973df2ec6728b9a74e932925e40e
font_05_sfnt_off00013a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A18 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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