Malicious PDF — malware analysis report

Static analysis result for SHA-256 1352f1be4fec8976…

MALICIOUS

PDF

86.7 KB Created: 2021-03-01 23:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 345a47d94fda350a31db2319cd016c62 SHA-1: d37f5056947df25e70a472ed31c7f18913c53c8f SHA-256: 1352f1be4fec89763320c093929db077f405d836a64c05486030901a71157f8c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one prominent example being a URL pointing to a PDF hosted on AWS. This indicates the document's primary purpose is to redirect users to external resources, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links and the nature of the heuristics suggest a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=artemis+fowl+%25282020%2529+filmweb PDF link annotation
    • https://ziregezetul.weebly.com/uploads/1/3/1/3/131398138/faganigivudedufobizu.pdfIn PDF document text
    • https://woxisuxifajise.weebly.com/uploads/1/3/5/4/135400236/puwuxosu_bipij_nofolasudavir.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/jageHw2/foco_video_music_video_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/ZibyhcJ/91753167158.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/aigeDgh/32387121813.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/8433482.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/7K1Gggu/jump_rope_rhymes_ice_cream_soda.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jjzii23/snowflake_svg_file_free.pdfIn PDF document text
    • https://vomasixesex.weebly.com/uploads/1/3/2/8/132815370/73cbeb10d.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/tigewibejageju/aprender_a_dibujar_desde_cero.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/podabifeveburosisolegav.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/31740882905.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/chundari_vave_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/coyuchi_cloud_brushed_flannel_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/mutual_aid_agreements_ics_200_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/kogebeziw.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/the_golden_manual_1850.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/gijijiforukobumofu.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/jusovesalezupoduponatukur.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DD 5352 bytes
SHA-256: 83ff0e4e7818f94d2c50cecb4656c71a26ca413119c23b49133571f6167b45d9
font_01_sfnt_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 11180 bytes
SHA-256: bafa6cdc6f63350f6f31c7141c86436e243cf3e46547b9424b70d8b152b18cdc
font_02_sfnt_off00013d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D78 6200 bytes
SHA-256: eb80847d8dba01a5820725e90e7ce34ea194e4a3655cd904e31c5f2c966969a8

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