Malicious PDF — malware analysis report

Static analysis result for SHA-256 830c4d3d78b88084…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 09:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f7fb7da9d02108343c3f7f487da25c5a SHA-1: 738b72381f25bb5a614da74b174379c65a205e98 SHA-256: 830c4d3d78b88084be9b1824b3dd5608c154d81c416a6f1ea745ba1ff86cbc97
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 0.9994

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 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://dafemum.ru/strik?utm_term=how+much+does+1+square+straw+bale+weigh PDF link annotation
    • https://cdn.sqhk.co/nokotadi/hbjjxq2/vutafixuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/V1hehfh/pew_pew_pew_song_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/ehfRDEO/condado_puerto_rico_restaurants.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/ig9hczY/mod_master_for_minecraft_pe_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/sgiojca/emoji_wallpaper_hd_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/somatugogo/mP5oAJA/fugisijugipowewela.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/ahjaSgg/earn_to_die_2_hacked_unlimited_money_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/741ca0e0-e7bf-4847-a224-311f3ff8fcfc/fewibalubebuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dfafa6-6341-46f3-8b4e-cef07abefe1f/nac2h3o2_compound_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/calories_and_carbs_in_leaf_lettuce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7076c9bd-0291-4e14-b559-a307d428ab75/12_steps_of_aa_without_god.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_338592e56c1848f7be2a3d4d5efc2a74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce105e8b-6700-43db-837a-786e2befd174/ccnp_route_300-101_official_certification_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80357f1-28bf-4056-9ce4-d859a6f57482/nebaponenaweveruguvefu.pdfIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_fe2521ba869f486387d7c64490a3d95c.pdf?index=trueIn PDF document text
    • https://e19809cf-df80-48c1-9975-8599b001ad7a.filesusr.com/ugd/062cdf_bd036475a673413a83b70c1604ba20bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3959cc3-ec96-45d0-a4a9-85f44ecacb1d/guxipipegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877f03b8-ea91-4b61-839c-e001e722c2d4/pibelifi.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/3182446974.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/17298634584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1b34d8-7358-4e1a-9388-40f6e3c70d7a/silence_of_the_lambs_series_chronological_order.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/kakowubonuda.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/bedsheets_online_shopping_india.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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 5724 bytes
SHA-256: 07e099100488d6ae086ddcfd0031adc26c13de317b923017ffab6cbc85e45ac5
font_01_sfnt_off000109ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109ED 11156 bytes
SHA-256: cb7faf2105fa5915e46ecd2d36a3b0057cd4a1cecfc1c0e86ad0994179ecc4b7

Open this report in the interactive analyzer, or submit your own file for analysis.