Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5348149e75366e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-26 09:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 390e3a7e9676b167cf6eb8fe26ab2b28 SHA-1: 5592352f32b8f84318d1b73839851c6f66f8040f SHA-256: bb5348149e75366e7ae60897be30a2a42dd1a3a304215d08bf83a6f1aff52178
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 0.9996

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://gimoguvi.ru/award?keyword=biografia+de+miguel+cervantes+saavedra+pdf PDF link annotation
    • https://cdn.sqhk.co/ketixudolu/Vihhdji/siren_alarm_horn_sounds_game.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/BOxtGgj/mewodiliwaribefaliwojepo.pdfIn PDF document text
    • https://tixiteto.weebly.com/uploads/1/3/5/2/135295688/tikawoneja-birokuj-wipagumenov-fapitolari.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/dtQjjie/ripto_s_rage_icy_speedway_orb.pdfIn PDF document text
    • https://vewenikeluw.weebly.com/uploads/1/3/0/7/130739128/xisewivarimuloduxogo.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/5Pwiaif/66177118247.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/nCboeih/safodeziboleki.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/hhGeBhc/18003071336.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/gokuxi.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/tulosa/vlookup_search_multiple_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/72889412140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa6dda3-ba0d-4b57-a6ec-84bb74569e6c/to_be_a_slave_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762f7e89-1efc-4e4f-9217-63e46baa087c/kin_word_origin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec343f75-80ad-4aa9-9170-ea11e3025fa4/51917373143.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/msi_afterburner_for_pc_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fdf7d30-fda5-4c7e-b0c7-39d1db67aa81/mifofotegijogopifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fd022f-1b46-42ee-806d-935cae713e9b/animation_for_dummies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/dalaweviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65f91c9-4032-4917-8afc-31cf11f42697/what_does_a_gunners_mate_do_in_the_coast_guard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c79ca2-bb59-4cec-8538-641a13a62d2b/craftsman_1_2_hp_garage_door_opener_trouble_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af4740b-1470-4c66-98c1-cb14b4531079/dewalt_cordless_sliding_compound_mitre_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc013be-8e09-4807-8400-cae07ec093ab/14164403280.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_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 5584 bytes
SHA-256: cc1dc15c9864934e20985c1395732b0593382fd7eef574d6a1550a1683926d02
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 11184 bytes
SHA-256: f7a2bfa90708fe698d7edc4cf3300aba259664000bdfb9fd57e129e53f629258

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