Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea3b10d6faf3ff4…

MALICIOUS

PDF

83.9 KB Created: 2021-03-27 18:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec4b70ff68380605f610be3fcdcd526f SHA-1: f270c144db2f483a3d37029663596f9ce1218c35 SHA-256: 1ea3b10d6faf3ff4e20b3d1d62ed7e8ddbebc7967f13741f775e0aa5430a4935
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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.
  • 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/wix?keyword=four+conditions+for+perfect+competition PDF link annotation
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/winudof.pdfIn PDF document text
    • http://mizolaresunade.iblogger.org/boiler_operator_s_handbook_second_edition.pdfIn PDF document text
    • http://muriwilosakud.iblogger.org/basic_knowledge_of_c_programming_language_in_hindi.pdfIn PDF document text
    • https://badikixokatapi.weebly.com/uploads/1/3/0/7/130739740/73e5028857.pdfIn PDF document text
    • https://guxizipib.weebly.com/uploads/1/3/4/3/134367178/xazege.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/mepigiwe_kulivakaguzoki_zimakuxa_dajuxipen.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/kodipopujufipig/70734626884.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/who_is_entitled_to_government_maternity_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/ford_3000_tractor_spare_parts_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/www.bpsc.gov.bd_non_cadre_admit_card_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/the_backbenchers_series.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/jenijogipulak.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/kixobefi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/52697001614.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/kajezidomodujetizus.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/vulifivupotovibogiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/47944486236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f26b43-e285-4341-bb94-502358cdf3f5/fossil_gen_3_smartwatch_q_explorist_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/how_do_you_reset_the_service_engine_soon_light_on_a_bmw_325i.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94a876b-1534-41d7-b582-fae5df271cbf/53640708200.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/revisidivale.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/found_blood_on_hotel_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/gain_moonlight_breeze_dryer_sheets_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/evenflo_chase_car_seat_reviews.pdfIn PDF document text
    • http://kojokijekuwug.rf.gd/how_to_tell_if_my_ryobi_charger_is_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702d2d9e-0630-4348-9e3a-c9a1aee41108/what_kind_of_bond_will_potassium_form_with_sulfur.pdfIn PDF document text
    • http://fesononojowa.epizy.com/17617260813.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_off00010bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 5012 bytes
SHA-256: 9e6daa1588c22bce9d2cf6f85bcb0e44d2d2ba1a9bebe0b028e8e9d8fd7d6bb4
font_01_sfnt_off00011cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD7 10864 bytes
SHA-256: 900c3ed35806a549d3ce1892079615c7d4b96721290f3af02197757015675538

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