Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cff18e05442b2a…

MALICIOUS

PDF

76.4 KB Created: 2020-12-07 05:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 16dd89ef33b8660761742faa1364e364 SHA-1: bdd8bf99b377ba1c73ba4b64e27ddd56b8cb78d7 SHA-256: 56cff18e05442b2aeecc1b8e5590e6c48979f8fb583c7fb7258567510d35ac6c
214 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 embeds a large number of external links characteristic of an SEO link farm and 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 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/123?utm_term=memphis+grizzlies+jersey+vancouver In PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/f1b4e2e.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/bewatona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fb3021b83d6e.pdfIn PDF document text
    • https://wosufixojiniki.weebly.com/uploads/1/3/4/7/134720754/watiw-vewusebaneguv.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/nibiwer.pdfIn PDF document text
    • https://garijonomiwobe.weebly.com/uploads/1/3/4/7/134711127/250482ad99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_5fbf6ca5a34b2.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/5fc10374bda9c57a97becd24/t/5fc7beb8efc65c5b7a4ecc1b/1606926010457/cracked_laptop_or_computer_screen_prank_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/calendario_escolar_zaragoza_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d40a86b-c52a-48e2-ba91-a601b4b2e0f9/xunogewineg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52399ab79f442f2450564/t/5fc8f0a3e75eec1f920c6bfc/1607004324260/kosoliz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d337abaecd331821e068/t/5fcbe3ca6e74d26c6f0bf59b/1607197642713/photo_collage_layout_editor_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6f3ed3-f8d2-4293-9587-fa8cb86c8149/kakoketiguroseposevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2973917e7202640f4fd6f/t/5fc63c61173fb5383b779e0e/1606827106516/pottery_barn_christmas_tree_skirt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc106fbd49dd1244734cdd3/t/5fc977d473e24d697d2af173/1607038935022/shaolin_kung_fu_street_fight.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D5 5640 bytes
SHA-256: 42c2e7d1722941860a0e8affb456e272040b7e42ad9c52b4352e756dc584178d
font_01_sfnt_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 6000 bytes
SHA-256: d2e982baea2a88742e8a9435c3bc6dd1677f213ec58986a8f8865f150df9e260
font_02_sfnt_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 11496 bytes
SHA-256: 3bec86763bc52174422992104858a33608889409e2c06975240cbdd7de892668
font_03_sfnt_off00010e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E51 16300 bytes
SHA-256: e1076772e0ba8d8e4809f2fe3f30bb1439cbbf8a9c4208d7df3f954b5b7e23e9

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