Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b46fed900bad78…

MALICIOUS

PDF

85.5 KB Created: 2020-12-26 16:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 252c99db8d740bcf80cec3734787c12d SHA-1: 9710567181260a80ebba20fbe0d613039f7a07f0 SHA-256: 83b46fed900bad782cea5c3d1856c24250476a113fbe85a899126680b39c3b17
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text suggesting a lure related to a music album to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=hillsong+united+new+album+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fad422688ce0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fc5e8e623e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fa2c865565c9.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/heejacQ/how_to_recharge_infection_scanner_sims_4.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/9hjgcB5/alchemy_shattered_pixel_dungeon.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/erRghfb/vigujukanenavejifokinibev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_5fb85b16176ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_5fabe749009f8.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/wOchfO7/mermaids_cher_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/IjhogfD/jurassic_park_game_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/czVpJjb/microsoft_teams_for_mac_version_history.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/tibanepoxilibud/62761762320.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/tonapekedesuboxe.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/azhage_azhage_tamil_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/9649025103.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/piaggio_beverly_200_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 5764 bytes
SHA-256: dda29c4075a47c69838996eed6a93e6484dde81d531301c41dc8d087facaf083
font_01_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 1888 bytes
SHA-256: ac14972b7b2947834c866a693307dd83921f9e40fad0e2ab592cecd13463aa54
font_02_sfnt_off000120d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 12268 bytes
SHA-256: 9e3b922c77eff5eb2fea7c107de59c339e2e98370bc5187afe744c4a4215fc3e

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