Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1191d517eda069f…

MALICIOUS

PDF

82.3 KB Created: 2021-04-05 20:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c2068aec95af2e2484d7ecb7ade2036f SHA-1: 5b7c907ddf0a333db5961e12fd66544bafab1e6f SHA-256: d1191d517eda069f5d10d88ad15f6c2c5391574ee97dbdbb355e9e1a27cccafc
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 0.9954

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://kuzutuzo.ru/award?keyword=cfop+tutorial+pdf PDF link annotation
    • http://genusadnlo.space/how_to_replace_a_dryer_drum_belt81oht.pdfIn PDF document text
    • https://fozaronu.weebly.com/uploads/1/3/5/3/135349809/bemetivapine-forapumusos.pdfIn PDF document text
    • http://proba7.xyz/jadivojinekajotuxwf2c1.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/2341455.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/dilinin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_6059585508244.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/gSOjh0A/chehalis_sheet_metal_and_cooling.pdfIn PDF document text
    • https://mopirolelawa.weebly.com/uploads/1/3/4/0/134012876/6960121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_6012e305d04e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_60369e7d1f4d8.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/bGkhfO5/bubble_bobble_game_boy_advance.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/5ginjcl/sad_heart_touching_mp3_ringtone_download_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/jaCiidR/rush_rally_3_apk_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dojagomudek/YhcrOie/goodwe_2kw_inverter_datasheet.pdfIn PDF document text
    • https://fanejutasoja.weebly.com/uploads/1/3/5/3/135399707/1043042daa62166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505358/normal_605d463af2a55.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/puretulenuza/milestone_xprotect_expert_2017_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/5425304902.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/5507693337.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/cyrano_de_bergerac_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/how_to_work_the_health_o_meter_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/65675805035.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/how_to_respond_to_one_word_text.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/8978003234.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/75266957678.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/bts_golden_disk_awards_2019_performance.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 3276 bytes
SHA-256: 7b479ed690575295793ff20440b3a77674fc204ba3553f372e50d8758e34bdfc
font_01_sfnt_off00010497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 4760 bytes
SHA-256: a65c46b72dbdab3b4a4fb25446de4be8f968b7956de2d330097071056862a0c9
font_02_sfnt_off000114d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D0 11988 bytes
SHA-256: 5623ff8036c2c9c907ff7e0413c63c57c4f7a7b09c1ee6099e33802851bfbc67

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