Malicious PDF — malware analysis report

Static analysis result for SHA-256 585c60ac13d6aa02…

MALICIOUS

PDF

157.5 KB Created: 2021-03-09 03:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c91b241ca62855b4ba5835baafa0cc0c SHA-1: b814a8fe9aef2688b4db4ff83c942709f3010419 SHA-256: 585c60ac13d6aa02c9a067becf7eeeb9d05ea43454709bd73820cefc40be742b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic suggests the document is designed as a phishing lure, directing users to a suspicious URL. While no scripts were explicitly extracted, the nature of the PDF and the associated URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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/award?keyword=iim+ahmedabad+case+book+pdf PDF link annotation
    • http://geloritiveda.mygamesonline.org/34098149857.pdfIn PDF document text
    • https://pumavamevimi.weebly.com/uploads/1/3/5/3/135391045/raboz_tinadekeb.pdfIn PDF document text
    • http://leafester.online/ejercicios_de_triangulos_trigonometrian4hm9.pdfIn PDF document text
    • http://kraftmann.su/performance_test_report_jmeter06f8z.pdfIn PDF document text
    • http://istlan.space/sajizewatagb44s.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/sat_subject_test_math_2_score_calculator.pdfIn PDF document text
    • http://golden-bridge.pro/arcane_quest_legends_guide0hjup.pdfIn PDF document text
    • http://azorocheat6.xyz/can_you_polymorph_into_a_dragon_5es6y9z.pdfIn PDF document text
    • https://zuzumapi.weebly.com/uploads/1/3/4/3/134344149/magew_loresamugedubur_bebogobo_badexuwov.pdfIn PDF document text
    • http://domsale.xyz/2604426338ek3e3.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/newekapaluzekupalobik.pdfIn PDF document text
    • http://memisada.mygamesonline.org/whirlpool_cabrio_washer_manual.pdfIn PDF document text
    • http://winoraama.website/25657268473vqvjg.pdfIn PDF document text
    • http://trylait.club/97750180681gn1f8.pdfIn PDF document text
    • http://blacktea.space/where_to_get_hawaii_state_id_card_requirements7duie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://s3.amazonaws.com/mipizaju/camidoh_the_way.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/22024758787.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/exhibition_invitation_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/anyone_can_whistle_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/benevitobima.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/android_17_dokkan_event_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/92901507029.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9EC 5408 bytes
SHA-256: 72bc7f39c253e87f96d22d8a4e22bacb45453b7abb85f59b9162a9f9181f9aa1
font_01_sfnt_off00020c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C27 6240 bytes
SHA-256: 536f4ad4e2b83d3dd30c6abba792c04769ba54497279bdc15f59048f729cdfdc
font_02_sfnt_off00022026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22026 15824 bytes
SHA-256: 583bcd06361deb5ff46f38f8e90b414fbca49c9cd475ac14c7a172b3602085ac
font_03_sfnt_off00025215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25215 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8