Malicious PDF — malware analysis report

Static analysis result for SHA-256 772784c41727ee10…

MALICIOUS

PDF

83.6 KB Created: 2021-04-04 07:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 78b6e9fe2930391af5d7f30c1ada9aac SHA-1: 5df9a84065f590d51263bbc1f1f95192eead7fdc SHA-256: 772784c41727ee10fd44252a4f5a614a03e055105cdf512a127037d76bcd2997
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting it is part of an SEO link farm or a phishing campaign designed to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of numerous external links points towards a deceptive purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • 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://s3.amazonaws.com/lekizopiloref/emotional_sad_song_whatsapp_status.pdf In PDF document text
    • https://s3.amazonaws.com/luxaduzimase/bilixopozeka.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/dusajetekuluduw-vajar-wikum.pdfIn PDF document text
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/1f49914e069ebd.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/what_wilton_tip_for_cupcakes.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/army_amino_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/97206031488.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/yin_rk._case_study_research_design_and_methods.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/4c35d26bb6.pdfIn PDF document text
    • https://vipagazowarofi.weebly.com/uploads/1/3/4/6/134685611/badaluse_zakiripexosev_zodenotesewe_xepoturijefo.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/vigantol_bayer.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/bluedio_t2_plus_manual.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/54264993718.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/auto_tune_7_free_with_crack.pdfIn PDF document text
    • https://bojomuse.weebly.com/uploads/1/3/4/4/134462584/dumapuzisi_govugogozu_zunapulapez.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/metodologia_dela_investigacion_sampieri_resumen_por_capitulos.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/math_worksheets_grade_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/Infin/~3/YW2AKwb2eCA/infin?utm_term=aditivos+e+coadjuvantes+alimentares+pdfPDF link annotation
    • https://uploads.strikinglycdn.com/files/175a3039-43fa-4735-9dbe-779ed9433274/vizio_e550i-b2_no_remote.pdfIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_2b7b3760eea7451c813e49ddb0ecd93a.pdf?index=trueIn PDF document text
    • http://fataragoreb.myartsonline.com/titrasi_argentometri_metode_mohr.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_d1c548c16f4a43eca0a3363fbde3de29.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_2ac51c07d3da445ca7d45dbe14f43ccb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde84afa-f80d-4aa3-9310-f43a802f13dc/45077333156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4378f392-c652-442a-bedc-65a2a589b775/pufiwuwogeniru.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/storyboarder_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35136c20-09b2-4fa0-9608-5641a30aa4fa/what_plague_killed_the_romans.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 5424 bytes
SHA-256: 26bdab3616484369529cfe36abf98983889b58b357513a3557bf78710b852ba3
font_01_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 1964 bytes
SHA-256: 7a94dfa282ce0347053782d8b955d7618f774adb37c3bd5f03dce838a494a32e
font_02_sfnt_off0001162c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162C 13276 bytes
SHA-256: 6d5aba572d2cea13a8b85834c3c10b72805f230b3f9a329e98bbcc1dc60ec72a