Malicious PDF — malware analysis report

Static analysis result for SHA-256 d738ec4d2bdbd377…

MALICIOUS

PDF

70.0 KB Created: 2021-03-11 22:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a0a3685c88feb5127db7402c335f1431 SHA-1: ba601d6be26b2846b7f3e438169ce1dd0c6b1935 SHA-256: d738ec4d2bdbd377c5f5394ecae5c7b51e53ae869a4750e1af213f5a6f038710
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to other PDFs. One of the primary external URIs, 'https://lozipotod.ru/award?keyword=present+and+future+value+tables+pdf', is likely a lure to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lozipotod.ru/award?keyword=present+and+future+value+tables+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370054/normal_60053f3916c54.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/19929411717.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/xajowinupejif-nonasaponaxu-juxumusen.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/43869413fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6023e1192fde5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601cfaf18d036.pdfIn PDF document text
    • https://pejetoli.weebly.com/uploads/1/3/1/4/131454808/fulodov-kojidumerigos-nebagigo-degujimapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fdb75a955810.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/2016_toyota_corolla_le_eco_plus.pdfIn PDF document text
    • https://kivijakesav.weebly.com/uploads/1/3/2/7/132740669/3511661.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/lupuvogotog/84715298155.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_f4d8ea8e451b409bb2789fed75f9e562.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_76c5735479184932a7c910c3e16e024f.pdf?index=trueIn PDF document text
    • http://desejole.myartsonline.com/73078788868.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/iit_madras_placement_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/palayathu_amman_movie_songs_mp4.pdfIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_90c1de095617436b8e4d29f434514108.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_817d5464fe6641909e403714eb446263.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/gubatobanugupoxasaj.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/9012555547.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/brendan_behan_the_hostage.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/zovunatidelixezap.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/biota_laut_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/gloomhaven_miniature_painting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/borean_tundra_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/the_crucible_act_3_irony_worksheet.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_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 5236 bytes
SHA-256: cb0e1cc51584236fc8589f15b246fd89fa2d3d878dfee1315979e04b971ea63d
font_01_sfnt_off0000e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 10464 bytes
SHA-256: 3d18f9074dd394346aacfdf71da97d8a74ffa02b97db92a4fc20352919e237ba

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