Malicious PDF — malware analysis report

Static analysis result for SHA-256 66fa92647d7c5ae6…

MALICIOUS

PDF

96.4 KB Created: 2021-03-28 08:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f2999a321b83213bd1cce5001d1ebe33 SHA-1: da78cffceb189c124644f05f526a06da5e33ce09 SHA-256: 66fa92647d7c5ae67c1706a3c7412db18108ab2bd75c3b6d2a9ef2d8cffd1faf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs, with one specifically pointing to a suspicious domain 'baarspo.ru' that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of external URIs and the overall detection suggest a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/award?keyword=classification+of+antineoplastic+agents+pdf PDF link annotation
    • https://cdn.sqhk.co/zosurinipin/cjagija/36901666258.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/u4jblhi/96063413231.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/ijajigg/14177853358.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/glgdje0/top_100_action_movies_2019.pdfIn PDF document text
    • http://boretibixakofer.iblogger.org/marvel_movies_list_in_order.pdfIn PDF document text
    • https://cdn.sqhk.co/susorajin/gi2hgnf/16885698387.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/gdDEhc1/ic_urban_dictionary.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/acer_aspire_ax3400_power_supply_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/hgi2if3/patixugatowudobesogami.pdfIn PDF document text
    • http://murupewobot.iblogger.org/dynasty_miia_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/hhigehe/detutitosugi.pdfIn PDF document text
    • http://gojemozuj.22web.org/13810801101.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/68790188168.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japinoxizidunub.myartsonline.com/gujarati_calendar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8052ba-efd6-4fee-8086-14ac514eb259/how_to_open_a_worcester_boiler.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/technic_launcher_pirata_atualizado_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545affd1-2c26-4057-8ddc-47a40002c265/kofenexegesub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda86f9c-6e57-4c3b-90f0-81ba29f56b2e/the_pact_2002_streaming.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/ez_chill_auto_air_conditioning_recharge_sds.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/falavofunelul.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/82292296719.pdfIn PDF document text
    • http://silumigu.epizy.com/minecraft_java_edition_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2338847-c015-40df-8102-530d4867c421/where_is_the_smart_learn_button_on_a_craftsman_garage_door_opener.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_off00013bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 5132 bytes
SHA-256: aae9ead376ae9817a47f39e3f783f3b4714cf063b252f1de1a3264b3842fa5d0
font_01_sfnt_off00014d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D36 11616 bytes
SHA-256: d484b92535f88ddc00fcd6a605c8c7ea1290ab52f2d027da4249754895e54baa

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