Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d153390c30bd76…

MALICIOUS

PDF

78.4 KB Created: 2021-04-04 07:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7559207686c3ab1d7491abfe3abaf2db SHA-1: cc269de526883b2bd1577f681bafc81b5c57d9b4 SHA-256: 90d153390c30bd76314460e52aff58a080a0c68024ea63deb68044cf40bceb3b
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/123?utm_term=canon+pixma+g2010+driver++windows+7 PDF link annotation
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/kumujuzas_xibenurekokemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_60620d831e614.pdfIn PDF document text
    • https://nopubileluzozu.weebly.com/uploads/1/3/5/3/135389839/1440051.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/fezaxaxefijisixefadakubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469386/normal_60557e6952563.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/sufidugilowakitotuno.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/adjective_worksheets_middle_school.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/44b50017b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_603584640c3f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5feb8dd8a1803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_6008191002db7.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/vuvuz-tavage.pdfIn PDF document text
    • https://vudaxevagi.weebly.com/uploads/1/3/4/2/134234865/2377681.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/62ccd7ba0ae1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodegifu.atwebpages.com/feiertage_aargau_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bca89a2-12e2-40d3-abb9-4ed992e3036a/vadetofipi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/3464937514.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/email_template_html_code_generator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/is_there_a_follow_up_book_to_the_couple_next_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4fa420-30df-4aeb-8c4b-1cfc0755e921/13674200506.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_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 5776 bytes
SHA-256: 1281f023f267f9b0fa40ded30c4e268e36b6f2b405e166bdd09582553c66d01b
font_01_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 10664 bytes
SHA-256: 16df40fa759b1717bfc7f84e4ce0b5359355191ed2b956cf245030e62e495996

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