Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ada482902f9af99…

MALICIOUS

PDF

73.6 KB Created: 2021-03-27 18:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6217efc44af1a703b35c00ad4e87c28 SHA-1: d8d6060e288ed3769cb01bae63acc15ebaaeedf8 SHA-256: 4ada482902f9af992a54c8082da4ff0e48d7ca6dfa8c0eee318bb00d81dd9e95
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are dynamically generated, indicating a link farm or phishing attempt. The primary URL, https://xezojetit.ru/award?keyword=breadboard+projects+book+pdf, is presented as a lure for a book PDF. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://xezojetit.ru/award?keyword=breadboard+projects+book+pdf
    • https://tujuwofaxeg.weebly.com/uploads/1/3/2/8/132814826/jowibegefagasuf.pdf
    • https://cdn-cms.f-static.net/uploads/4425727/normal_601cf7a0cfceb.pdf
    • http://kopogaxepaku.sportsontheweb.net/matlab_plot_line_size.pdf
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fda3087318cf.pdf
    • https://cdn-cms.f-static.net/uploads/4453906/normal_60159c2937856.pdf
    • https://cdn-cms.f-static.net/uploads/4413345/normal_603a7b80cc2f7.pdf
    • https://ferowadamo.weebly.com/uploads/1/3/4/5/134593689/8652700.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_60531e4cd0450.pdf
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/votejajiferola.pdf
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/3198a5f.pdf
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/e11c1902.pdf
    • http://digosige.mywebcommunity.org/78886548235.pdf
    • https://static.s123-cdn-static.com/uploads/4404512/normal_6003ab7632f94.pdf
    • https://static.s123-cdn-static.com/uploads/4412889/normal_5fc73d65b15b7.pdf
    • https://cdn-cms.f-static.net/uploads/4447631/normal_603515a83d5a7.pdf
    • http://warowusavi.mywebcommunity.org/why_does_wild_rice_have_so_many_calories.pdf
    • https://cdn-cms.f-static.net/uploads/4416787/normal_601447285b9a5.pdf
    • https://static.s123-cdn-static.com/uploads/4489257/normal_5fed9b5a1e689.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xekapakifujekem.onlinewebshop.net/nufedagiwudilobibikagibos.pdf
    • https://uploads.strikinglycdn.com/files/25fe76ab-19f2-44a6-b8c3-c332723b75e0/honeywell_fan_not_spinning.pdf
    • https://uploads.strikinglycdn.com/files/d126882a-5228-483f-9a68-33035d9bc4e5/35519478007.pdf
    • https://854397d5-242e-4836-9f1e-4d22a5541959.filesusr.com/ugd/88a329_2b72ca95713b4d9799f6aa2236a915eb.pdf?index=true
    • https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_937fd1a637a840c6bddaa66057873f95.pdf?index=true
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_3203aa21a7d04546ac4f1d483561eb9a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ed37ac50-50ac-446a-8ebf-60a9a4b08bd8/what_type_of_bond_is_potassium_nitrate_solution.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee38.bin
0cf9e06e0bda95cec7aca07963925b33203ebda84e9d55a8775a75224dcb03bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 5448 bytes
font_01_sfnt_off000100ce.bin
88f68e4c210faf1cafc1dcb4351b0521c89d0185e56233b5167da1c3916f18df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 10752 bytes

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