Malicious PDF — malware analysis report

Static analysis result for SHA-256 c512d257669686a8…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 02:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3c671f00d2abe1e8acad5b974e25bb37 SHA-1: 7a913d891b1efe47d8091dbfb8cfbd99ac0ce5df SHA-256: c512d257669686a8fa926d481bf1c6fa15a6b3597e1d03cd865aec0e3490afbe
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=ndlea%20app%20form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409623/normal_5fcf329148f8d.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/wowabozabu.pdfIn PDF document text
    • https://ximuvibimujobu.weebly.com/uploads/1/3/2/6/132695583/3eadefee4e10b5.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/e913705ea14.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/hypercholesterolemia_diet_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fe53f7d61fa5.pdfIn PDF document text
    • http://doweryklkq.space/mera_bhola_hai_bhandari_djpunjab_songj0hxs.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/ff3796e685.pdfIn PDF document text
    • http://prizinsta.site/agility_damage_bonus_niohis6kt.pdfIn PDF document text
    • https://tetuxexe.weebly.com/uploads/1/3/1/8/131871535/fawijazoxokesutilese.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/zomuzigo/61933270459.pdfIn PDF document text
    • http://watitabetunob.epizy.com/bsc_nursing_2019_application_form_in_tamilnadu.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/jepanegilivimuni.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/97929106448.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/executive_summary_for_project_management_report.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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 4976 bytes
SHA-256: 768381fc0e3caed658dedf25ce3d6e55ffd5fa61e985b273d5a6797f67ba30b2
font_01_sfnt_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 10436 bytes
SHA-256: be72a945395e4b1b2de4c0267efe328868070d71e4aa938a7e4cc1f8bcfe047b