Malicious PDF — malware analysis report

Static analysis result for SHA-256 34af08cf134f1704…

MALICIOUS

PDF

80.9 KB Created: 2021-04-11 20:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7985500fb9dc0067a17302fb4ead71b7 SHA-1: 67b8104467c4db2407ff06266e9f921737ad5b39 SHA-256: 34af08cf134f1704fbeceddc98c5af6540fc11692d4fce97614134ff36d060f7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, 'https://seumenha.ru/strik?utm_term=how+much+does+macy%2527s+pay+per+hour', is likely a lure to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://seumenha.ru/strik?utm_term=how+much+does+macy%2527s+pay+per+hour
    • https://wededizopi.weebly.com/uploads/1/3/3/9/133986349/wategurorotapus.pdf
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/50b5410b81f42.pdf
    • http://zezarujewida.iblogger.org/cprit_grant_guidelines.pdf
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/pokapaxu_zitezunut_vubijene.pdf
    • http://koxelomese.iblogger.org/nugixomizokupi.pdf
    • http://loberas.22web.org/android_studio_installation_steps_in_windows_10.pdf
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/2317890.pdf
    • https://zerasogamonan.weebly.com/uploads/1/3/0/7/130775055/57f6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/06118623-4bc2-4d43-a7aa-4b7e459de721/dikutabixumagofuluzozajiz.pdf
    • http://godavuvexo.epizy.com/s3_cloudformation_yaml.pdf
    • http://vuwotona.epizy.com/telephonic_interview_conversation.pdf
    • http://siwojanapav.epizy.com/79868196697.pdf
    • https://uploads.strikinglycdn.com/files/14d840ec-d2f5-4783-9399-1c4419640bcd/ion_block_rocker_battery_life.pdf
    • http://fizufizobizud.epizy.com/gonamadav.pdf
    • https://uploads.strikinglycdn.com/files/cf0ada16-a130-45b7-a8d7-a640b099f34f/50788832543.pdf
    • https://uploads.strikinglycdn.com/files/0267aa34-951c-4d9a-9b12-695ea51f30e4/kugajabeleton.pdf
    • http://babokad.epizy.com/is_america_visa_lottery_form_out.pdf
    • https://uploads.strikinglycdn.com/files/cc42cb3c-70de-48ab-8b25-44196cea22f8/garmin_nvi_2589_lmt_prix.pdf
    • https://uploads.strikinglycdn.com/files/6c9a39e5-32f4-4981-ab2f-50d3c478652c/how_to_add_film_to_polaroid.pdf
    • https://uploads.strikinglycdn.com/files/f0501e52-807d-49e3-8f87-999359e575d9/sufupitosojozukof.pdf
    • http://delunax.rf.gd/censer_trial.pdf
    • http://lobawapulovad.epizy.com/life_application_bible_commentary_romans.pdf
    • https://uploads.strikinglycdn.com/files/d617a28d-ca66-46b7-84e4-253734f3f9b9/vetobazuwepusulel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd91.bin
84383a2c05a26b9c736e3231970eb79ac0fac70ee6fa53342b18b98d69fdb647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 5468 bytes
font_01_sfnt_off0001101f.bin
c002f12748f8edc98088864174c3657b02269be3f1e86c800aac44d313a1ff3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101F 11160 bytes

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