Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5baa8773dbea389…

MALICIOUS

PDF

68.6 KB Created: 2021-02-14 07:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 535839268377aa03496e0cb9e3efbc7d SHA-1: 05a958fcd3ea7cdb2c0f1aed833758fcc4564642 SHA-256: e5baa8773dbea38941141d3cef3a2f36abefbc81f162e5cdc8f813f327b2031d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=descargar+libro+amor+y+respeto+emerson+eggerichs+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5ffb0c5d98994.pdfIn PDF document text
    • https://sididipukiwe.weebly.com/uploads/1/3/1/3/131398020/9126680.pdfIn PDF document text
    • http://bestita.space/xifejimakitofaruebjdm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fdb55661cd07.pdfIn PDF document text
    • http://acgmgroup.ru/moon_palace_cancun_resort_map1j6rd.pdfIn PDF document text
    • https://kofutisidizeb.weebly.com/uploads/1/3/1/4/131437743/puzikubo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_6006a5b596b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_600ba8acaa299.pdfIn PDF document text
    • http://akmurzina.com/manikoxiwiluvabuxizuwisbqwo5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/wallpaper_ansatsu_kyoushitsu_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/fijaberisaruzarasilebu.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/toxicology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/lopawejusexesowogajidu.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/jezafatexipogimojebot.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 5808 bytes
SHA-256: 4f516f41ee0507b7394228153c8a498ae27571395cfc182a9a47cc92367751e9
font_01_sfnt_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 11664 bytes
SHA-256: 859492a5fef7cfe8ac78b9a4b2f66182684ecb00209f37603e005efaf64922c0