Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac35ee59fd3f4e90…

MALICIOUS

PDF

82.2 KB Created: 2021-01-09 22:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aab88c1a5646a84ff999d5c1a9671f30 SHA-1: b69a05339d77af066a6ad0245101d1c0f4432c31 SHA-256: ac35ee59fd3f4e90ac86f56261e60f80295cafb897a819fe37b1a400df55544e
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=adaalat+episode+211 PDF link annotation
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/cc38d230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_5fe8d65d9b293.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/Vum6K6p/fejex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421764/normal_5ff712a118186.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/bhdiigt/75018079196.pdfIn PDF document text
    • https://cdn.sqhk.co/golizojuw/hiHVSa0/free_bass_booster_for_spotify.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fc65cbb41f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fa6ec6c0adf3.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/hdIgfyk/drag_racing_mobile_al.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_5fbfb13b20bbe.pdfIn PDF document text
    • https://site-1178979.mozfiles.com/files/1178979/37633538465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453890/normal_5fba09151d84d.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cLuhcgg/best_virtual_girlfriend_app.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/kavegemewifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/19596814975.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://www.gnu.org/licenses/gpl.htmlIn 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_off0000c707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC707 4712 bytes
SHA-256: 8521c9e5f201eafc696ad3a64a890e9f1b77a65c7bf2047b3c0c716bd6eb1a25
font_01_sfnt_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 5832 bytes
SHA-256: 6eef17cca16ef90a65ebc4001fdef8bbb011ded3497f5d9808b15caa6d0d8ff0
font_02_sfnt_off0000e5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 10500 bytes
SHA-256: 46c966c7fd2b961421ee68e31a22652caf282a21b551875fc9c6f96e2e9407ee
font_03_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 16120 bytes
SHA-256: d61de05247b0214b16833f92d38757e7791f684c14490fd752cf54ece9267098
font_04_sfnt_off00011e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
font_05_sfnt_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 3412 bytes
SHA-256: 38cace7e2aa89cd66b304f6ebe85476e63ebcedafddf5b13cc51d6e14b77859a

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