Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fabd0933c0e81b8…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 12:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd283904514000c5ea5697d00c0ba2ae SHA-1: ec62165af50029e86bf146ded3b7345f2efa9f5e SHA-256: 5fabd0933c0e81b821ec29a2949900467ea665049294419b867e1444aa622ef3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/123?utm_term=algorithms+examples+pdf PDF link annotation
    • http://vugekowuzujed.scienceontheweb.net/2001_honda_civic_transmission_rebuild_cost.pdfIn PDF document text
    • http://pukogika.iblogger.org/iphone_6_bypass_icloud_activation_free.pdfIn PDF document text
    • http://palopepidek.mypressonline.com/sybsc_it_syllabus_mumbai_university.pdfIn PDF document text
    • https://cdn.sqhk.co/siboxowimu/geIW2ic/police_dog_simulator_3d_apk_download.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/learn_english_app_for_windows_windows_10_free_download.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/fetal_warfarin_syndrome.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/0Xifjh1/36820275622.pdfIn PDF document text
    • http://bunewasebawaxig.iblogger.org/final_fantasy_7_remake_xbox_release_date.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/31677334834.pdfIn PDF document text
    • http://wisecredit.info/558756831720gmqr.pdfIn PDF document text
    • http://goodsun.space/plc_programming_tutorial7adka.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/xiwevitox/cornerstones_of_financial_accounting_3rd_edition_solutions.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/vibiwitobexukewir.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/56062127133.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/93217590715.pdfIn PDF document text
    • http://nowuzapifara.rf.gd/ffxiii_guide_side_quests.pdfIn PDF document text
    • http://jixukituzok.epizy.com/marlin_glenfield_model_60_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/adblock_for_chrome_android_browser.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/baby_video_songs_in_english_free.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5512 bytes
SHA-256: ecbf15e939b707ce922fa3a63e23b1699108d3d6fab5f9bac5f195a4668e59c8
font_01_sfnt_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 12196 bytes
SHA-256: 12d31acb651fffeefa1fd4fb8500511ca948a759dd2f51c227ca3f7f056e5f08