Malicious PDF — malware analysis report

Static analysis result for SHA-256 07aebb03916b1847…

MALICIOUS

PDF

72.9 KB Created: 2021-03-10 05:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed2c84d4639c065a75ab4cf72b5e5529 SHA-1: 13e5d048a31587c035f043a88b06f7ca3a688096 SHA-256: 07aebb03916b18476d7119b268ede2d9a8559109a0a210371f33f5c76b2a0f2a
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-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://jottigo.ru/award?keyword=kasus+bronkopneumonia+pada+anak+pdf PDF link annotation
    • https://cdn.sqhk.co/vibebexez/gghjn7w/retro_quiz_classic_video_games_trivia.pdfIn PDF document text
    • https://kotimujisozun.weebly.com/uploads/1/3/4/8/134880640/968d4.pdfIn PDF document text
    • https://dinidoleto.weebly.com/uploads/1/3/0/9/130969871/9875821.pdfIn PDF document text
    • https://bagawilikazukir.weebly.com/uploads/1/3/1/0/131070307/25260560f2da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fc805051bed3.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/70pggjh/92568498911.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/pironozogon_tudaja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5fc7f608aedd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60292838cb530.pdfIn PDF document text
    • https://forozuzatopu.weebly.com/uploads/1/3/1/8/131858118/lexuludu-gibuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_0c00db8707b740bcbfec5d993dade0ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/disixinanesugebimojanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/honeywell_analytics_e3point_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/dufupob.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/sql_injection_cheat_sheet_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/algerino_il_est_ou.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/50829732884.pdfIn PDF document text
    • https://c8ff5639-09d9-4535-8c68-e7569a30476d.filesusr.com/ugd/0bcf16_f94ab5bec6f24e6395c9680d01f2445f.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_99406f1736db4e4bac07333361b1fd11.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_941b1275c8304105b1614beeca70d453.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupojakami/jizupet.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_11ab4839780444bea2080a99b4477486.pdf?index=trueIn 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_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 5328 bytes
SHA-256: 3a8f0009261f89690a2636790f3ed9c5bc754fda3d95eedcc1d83963de73b42e
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 10104 bytes
SHA-256: dc7fbc3aa659f045f26d5c225e03a080840cadc97341e7df3d0bb51451638035

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