Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a0b64bca619fd9…

MALICIOUS

PDF

82.0 KB Created: 2021-01-15 01:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91526d97f2157aae52461231dc3c8490 SHA-1: 6481ce928ca576a2754eb3b2504a83343e4bf824 SHA-256: e6a0b64bca619fd903e5a087eb06c66b69c13b40ee27605625cd193f9133435d
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 0.9996

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/123?utm_term=what+is+the+sum+of+the+interior+angles+of+the+polygon+shown+below+%25E2%2588%2598+%25E2%2588%2598+degree PDF link annotation
    • https://cdn.sqhk.co/muvetowiripa/thdEBig/62810849228.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/2GI6pN7/12610087284.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/0sgfwhg/lokatavitudubadoj.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/wuwajigupexulozu.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/whFjiYK/device_manager_apple_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ihf292b/94278090669.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/vufufafonubebu-togujetelej-gawopuw-sirot.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/hgXPgdl/xafomewifatiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5ff5ab12c2c0d.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/jenisozazewubo/14700742183.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/kulonudutupunifususabuzef.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/nanejupifu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/calendar_2019_november.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/business_letter_format_cbse_class_10.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_off0000daca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 5684 bytes
SHA-256: 78535f4d04ab688f30a5f4fed0985eef169beb6bf617bb557a60838e0e469055
font_01_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 10924 bytes
SHA-256: 5a2dd3e2098ec61c302ac7c523f2befa2f492c4ff9cd23206c2bdb7cde316223
font_02_sfnt_off000113a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 16212 bytes
SHA-256: 9227eb62ecd5110e2b8a608bc052030adc7ebfeb330dfb978d58fd406806c4f4
font_03_sfnt_off000128ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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