Malicious PDF — malware analysis report

Static analysis result for SHA-256 2861a36b66f116c0…

MALICIOUS

PDF

80.4 KB Created: 2021-05-01 09:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e828ab85debc85663184166097ac209 SHA-1: d42358ccfbbbeab5a27422a6edea3ad6b8626203 SHA-256: 2861a36b66f116c0fc73c1aa9e6bd60f597a6ca810256f084b0a6c8d0da2e2fb
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The embedded URL `https://lozipotod.ru/strik?utm_term=difference+between+g4+and+g5+glock` is identified as a redirector for free-download phishing. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=difference+between+g4+and+g5+glock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5fec556c309b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_604fad154231c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5ff8d6e2c4a9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_6000951bd08d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5febbe3103a80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369525/normal_5fd07d2c0ab69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_602ff64c8b56c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_6003be4677e5f.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/6e841228-729f-4c87-95d7-c2947c6dc9a0/adler_barbour_cold_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/nenesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e73baf5-bedc-4a76-92d0-f9cfa4a6f3ae/la_culpa_es_de_la_vaca_para_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daed8678-fd8c-4642-b73b-a73192c82a63/68970441307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3eae41-03a3-4b8b-8ef9-5cde450cc85d/which_mower_is_better_toro_or_honda.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/deltran_battery_tender_plus_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98131cc-5e9a-4e77-a966-4db34789afe1/17507653752.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_dfbcaeddc25747d1929292a0405c5105.pdf?index=trueIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_5b0a4822262345519724ba24b479635a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/online_co_op_survival_games_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/koruranozafami.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_768ac49b17c24350a67ac10290b5df5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/azar_premium_apk_indir.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_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5520 bytes
SHA-256: af85face04dcdf0c78a45e59e4a76bc915d661cf35d45f9f224d68b46bd771a6
font_01_sfnt_off00010cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 11124 bytes
SHA-256: 155e1fb3363954956f7b80b442d80521cd337e12afddf0ce4d7c064736da24a1

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