Malicious PDF — malware analysis report

Static analysis result for SHA-256 4631dadd38dd1ab4…

MALICIOUS

PDF

69.0 KB Created: 2021-03-06 08:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1de728328181e97917ac77f4e428b92e SHA-1: 9da47068bb919fe8555a01c2adbfc90d25fb9266 SHA-256: 4631dadd38dd1ab45ae94dd91859ae01519cf7d41915fca52e41d3b5992fa97a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=wheatland+mo+school PDF link annotation
    • http://organic100.fun/child_care_health_assessment_form_paqasvc.pdfIn PDF document text
    • http://aicberg.net/best_brandy_melville_sweatpants_dupez1e7f.pdfIn PDF document text
    • https://tejemovifizak.weebly.com/uploads/1/3/2/6/132681066/xebamegosateje-jiparenurosepa.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/50ec6edd65.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/97d480479b0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_6027879637d64.pdfIn PDF document text
    • https://mafoguwof.weebly.com/uploads/1/3/1/4/131438304/sawolepeler.pdfIn PDF document text
    • http://2gusevshop.space/kitchenaid_superba_oven_door_glass_replacementsq9ni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_60111a3f7f5e9.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/3250c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_601e439907302.pdfIn PDF document text
    • http://lg-copyright.com/24993721750h4k3k.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/document_control_templatevldbc.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/fe8f6d07297b.pdfIn PDF document text
    • https://sirubiruxegame.weebly.com/uploads/1/3/4/5/134581195/sisowijuvezij.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/gazijewevan/15900574870.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/keystone_credit_recovery_english_12_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/biostatistics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/airasia_berhad_annual_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/77649982496.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/singapore_math_grade_3_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/is_tokyo_ghoul_child_appropriate.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_off0000d1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DA 5096 bytes
SHA-256: 1b7a7ad012475d76ee0dab5a80afb86da34cd4ffdcb21608922cef2d5d25ec38
font_01_sfnt_off0000e30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30F 10492 bytes
SHA-256: 35048570fff3c0e5fdc77dd1cb0bb528c2c1423a37e7a84cf9694667e4e9ce17