Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3be7affbf37015f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 11:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 64257b873a1d76184e2c1a51423d3d10 SHA-1: b664c7baf2fbf14b936acf2874d2a60df109cabb SHA-256: a3be7affbf37015f7da713dacc93d2f9fc9cb64920ae9f2058306e2864c111f5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The primary malicious URL identified is https://maypoin.ru/strik, which is likely part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=how+to+read+a+tarot+celtic+cross PDF link annotation
    • http://viwavidif.getenjoyment.net/desix.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/z2hfIcJ/bapeluponipizuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/garisuvonuk/idJjege/vajimowivutejakovug.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/hjrghhd/five_nights_at_freddy_s_unblocked_4_life.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/hb0ihjd/best_guide_for_among_us_funny.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/relusudifip.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/carding_via_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/jhjHhgr/10149131964.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/how_to_clean_rowenta_steam_iron_soleplate.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/3rd_grade_worksheets.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/fifuto/hello_kitty_drawing_sheets.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/ryujin_3.5_diagram_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86527d41-768f-453f-9465-1aae912ceda4/xepisosixato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de971093-a814-4715-9a5d-ca7673adc95c/core_java_coding_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/demaroxus.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/pevojifelunukofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbff1a8c-b22c-420a-a9d9-3d1f1303f898/loseso.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/how_to_revive_a_18_volt_black_and_decker_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/mulasujal.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/xaretewegosumopaput.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/bogewagiwexolepupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b88205-f8e9-4155-9fed-7981d266ce7d/spotted_lanternfly_damage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f816fd4-78c4-41ca-a324-298e9ca68129/rikukesivafewuro.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/41744117355.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/69392196615.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_off0000ed5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 4984 bytes
SHA-256: f66d4be2f7722edcabf0a6779aa50d102aa5c0ea0ded1efbc9d2ea1ac4a87186
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10884 bytes
SHA-256: 8f4d11e0026a8de273a84fd42cfd07f42587f8f3bb077ca32ca379d4acfbd0bd

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