Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a126cc04f7b9ec0…

MALICIOUS

PDF

76.7 KB Created: 2021-05-23 17:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0470f5f7e862e0307580f3785dd0e750 SHA-1: 45799cb690dcfe4260a2b5144df857dc5c231080 SHA-256: 5a126cc04f7b9ec0c997632359246e0f529f3f231e6f95b22e744e60b9523c94
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics, along with the 'PDF_SEO_LINK_FARM' finding, strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Barcelona real madrid 2019 score', suggesting a lure to attract clicks to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=barcelona+real+madrid+2019+score PDF link annotation
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/7510054.pdfIn PDF document text
    • https://lijimoxa.weebly.com/uploads/1/3/0/9/130969704/pibogakigubamof-gumebupex-wozomewonikapip-bamaleboka.pdfIn PDF document text
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/6272528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_6062159f0334b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370303/normal_5ff64be2401d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fecb46bb52fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_5fda1c61591bb.pdfIn PDF document text
    • https://wuwosafojopog.weebly.com/uploads/1/3/1/4/131407683/juboxetelu_vokipafufe_gakijidube_dobodebefageb.pdfIn PDF document text
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/12ce6679da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fdff68d88f8a.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/luramamelolem/forma_del_verbo_arrollar.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/electronic_health_care_records_policies_and_procedures.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/am_alone_images.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/61002685492.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/95447956047.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/pijipofadapixi.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/cystic_fibrosis_exacerbation_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8381b9-a9e1-4d27-899d-d9066fa708d9/descargar_sony_vegas_pro_10_para_windows_7_32_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/58596124799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17978ea5-dabd-4dce-99ad-65c82822a711/stihl_fs_76_carburetor_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/aisha_film_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/99800186043.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_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 5616 bytes
SHA-256: c95f17331a4f8de4b48f3f60ba9f6b9a079fa2a9db36aeaac6881e82a4be866b
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 10592 bytes
SHA-256: c44ad55c25a87260ad4f7fd44ceadca6da45c59dd6e9a98ad755cb87bdd84e0b

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