Malicious PDF — malware analysis report

Static analysis result for SHA-256 37eeeb6b8715545e…

MALICIOUS

PDF

73.4 KB Created: 2021-03-23 07:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 83dc08620617e8b3cc58caf11ac446df SHA-1: 6f90e547dfbd845289d6f7e662a3a33e5117d2a4 SHA-256: 37eeeb6b8715545ec6dbb026769c605db9968aae8f43d93e79bd3380ffcb7ca7
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 0.9997

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://baarspo.ru/award?keyword=lic+amulya+jeevan+823+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fdc16f452fb6.pdfIn PDF document text
    • https://rivopezip.weebly.com/uploads/1/3/5/3/135325518/fca81176520410.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/golden_song_season_3_ep8.pdfIn PDF document text
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/tanazixanefufob.pdfIn PDF document text
    • https://nuvefozilif.weebly.com/uploads/1/3/4/7/134733792/2440160.pdfIn PDF document text
    • https://tinabatof.weebly.com/uploads/1/3/0/7/130776088/gapun.pdfIn PDF document text
    • https://pimalikatirowo.weebly.com/uploads/1/3/4/0/134040386/5856818.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/18c24108007e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_60589fa959886.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/1922748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_60344dd5b89ba.pdfIn PDF document text
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/xekigoxu.pdfIn PDF document text
    • https://sugogovofel.weebly.com/uploads/1/3/1/0/131069978/velazame-xurudonovanij-jofix-lewanuxofoji.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/aws_certified_solutions_architect_exam.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/lupebesu/delete_gmail_account_in_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/kuvuxelalovetuvefefudelo.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/kobodinademexona.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/1834683116.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/describe_yourself_in_5_words_best_answer.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/97694431374.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 5696 bytes
SHA-256: ca428ae4fd4098da3b4858c7ba6557920c35a2b2498c4ba6a49aecc5de0dbeea
font_01_sfnt_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 10712 bytes
SHA-256: 8ff8568be7e16e18bbd26abea219520e4748f4c66ae839b400465e62ca1e71a5

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