Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ec7ca29dc943bb…

MALICIOUS

PDF

67.9 KB Created: 2021-02-13 04:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6e0fb698d797b02b7bac44708017f213 SHA-1: bbac8b2442f79188181b31de378b51e2ba38d0fc SHA-256: 81ec7ca29dc943bbc9d3200feeb81169fc319fecbdd6ff1c47f6bb39ba3566ad
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=cateye+padrone+smart+manual+espa%25C3%25B1ol In PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/givesukejirepe-lefef-letekafawemav-rofaginegikuvud.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/79225c0477.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/ieB3kja/14109040521.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/2466645.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/kosututo.pdfIn PDF document text
    • https://cdn.sqhk.co/motuxeneb/aihahGc/dinosaur_bounce_house_rental_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/Uihkfoo/zombs_royale_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/a6icdjg/this_war_of_mine_character_death.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://patikogoxuxit.epizy.com/funopixowaxofaximaw.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/chinese_history_a_new_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/api_platform_generate_swagger.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/breakup_diary_shayari_image.pdfIn PDF document text
    • http://ripijinev.rf.gd/57750063008.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/dynacord_l1800fd_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/tovonub.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/graphing_inequalities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/38287280137.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/73553681160.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_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5324 bytes
SHA-256: 9b248750a283225a74a33d2d3093d27bb626dede86fcb94342e5e275692bff23
font_01_sfnt_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 9840 bytes
SHA-256: 716cea03ddca7332c02139137b3fb82c9d066e3965e91ee517ab2a36a3814158

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