Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a23081c327dc0fa…

MALICIOUS

PDF

78.0 KB Created: 2021-02-15 21:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 602d4f6f32165433b82f796c77b9c522 SHA-1: bf93d4e462a5848ea228cf218e0d61d6c335b639 SHA-256: 0a23081c327dc0fa98118c9cef78ae52b1863a1e4298e7d35404d78252948ff3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded external links, with `http://blancop.xyz/50413163077hoeb8.pdf` being a prominent example of a link farm. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=what+is+the+meaning+of+the+word+veldt PDF link annotation
    • http://blancop.xyz/50413163077hoeb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_602995a55eb4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471235/normal_6007e58a4c1d1.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/c9234.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/1558509.pdfIn PDF document text
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/548889.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/6231470.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/aambala_movie_songs_free_320kbpsibcgb.pdfIn PDF document text
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/749efc.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/zaxadakiv-vopuludejuwuna.pdfIn PDF document text
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/6691612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_6010fcbbdf46a.pdfIn PDF document text
    • https://labekefetimobu.weebly.com/uploads/1/3/0/7/130739294/8915318.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/jumedemimo/o_bhaiya_all_is_well_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/pazenetubos.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/kerosene_heater_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bumukore.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/roaster_oven_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/33990579477.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/contemplated_meaning_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/alaporan_tamilan_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/video_er_app_for_ios_12.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5484 bytes
SHA-256: bfdb4105d434a2adf75347a2b26013f8a81e11c6fb010dca72847caa998220a7
font_01_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 10744 bytes
SHA-256: 36ae108075157577ef8d4e8260fd1dfcadfd3f36fb389550bc6bda695be6b31b

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