Malicious PDF — malware analysis report

Static analysis result for SHA-256 31abd54f121cdfd1…

MALICIOUS

PDF

73.2 KB Created: 2020-11-26 06:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: de9866ab3d31cc7f0b9af4313055d603 SHA-1: 93c0daaa9d0b000922341fb43e062f88008a9002 SHA-256: 31abd54f121cdfd129c51a1ddff8a3ba66d576ef0493aac45575031b46d74010
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lottery winnings or parcel delivery. It contains numerous external links, suggesting a link farm or redirection mechanism to facilitate the scam. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or fraud attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffset.ru/123?utm_term=three+houses+gardening+speed PDF link annotation
    • https://pedutiwoda.weebly.com/uploads/1/3/4/4/134481784/2531214.pdfIn PDF document text
    • https://javodamujuwevef.weebly.com/uploads/1/3/4/4/134446411/nakuxokefiwapur_bodine_luworaduk_tumawuraxideni.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/xezomomob-sesuwuriz-judesopagu.pdfIn PDF document text
    • https://xasazixasemopib.weebly.com/uploads/1/3/4/3/134306387/kebis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ce2ad3-658f-41dc-b54c-41c1009c2aae/motivation_frq_ap_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05c1795-0273-45f9-807c-2a92dab0f1ea/arma_3_tactical_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdb451a-e0ce-4336-a535-fd87c7a1b025/www_couchtuner_2._0.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/23967604097.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/24530875861.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/gmetrix_word_practice_test_2_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c60c97-fc1c-465c-a29c-aaf8288347f1/5237654166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb1e32e-bf98-4224-b503-29b2b5425635/92678349114.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_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 5136 bytes
SHA-256: 5bdbb4b7f2bb71de38032a103020fbe14487e04382a4f07454d0a846c96bd34a
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10672 bytes
SHA-256: bc773e71314926eb33ecc8c229badfba451661f59f1e4d9ab291cb951f44825c

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