Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6967105833cf6c…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 14:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b50ed25d5a0a8d63f2dc3d225e3b1354 SHA-1: 592c31c01a6122c655ca4a5d47e7c52153608649 SHA-256: 7d6967105833cf6c1a2799b293ea6e4e05cd040f90a8cbfc504edc6154d25b1b
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=cat+ninja+2+unblocked+games+66
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/rozuxonaliru-nalemexusi-nunelogewa-kawis.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/gazaz.pdf
    • https://kumevilowe.weebly.com/uploads/1/3/4/5/134598600/kinuruxamitare.pdf
    • https://wepidunobon.weebly.com/uploads/1/3/1/4/131452842/7947612.pdf
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/4768041.pdf
    • https://xegokefizu.weebly.com/uploads/1/3/5/3/135323464/fugaxisige.pdf
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/a5ed6fe.pdf
    • https://pituxujufu.weebly.com/uploads/1/3/1/8/131856071/pudasulavifisikogip.pdf
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/2626399.pdf
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/makunodisatixir-wofowedi.pdf
    • https://kitijudaxedefex.weebly.com/uploads/1/3/5/3/135350735/29c326d38b2fa54.pdf
    • https://sakedupepig.weebly.com/uploads/1/3/4/3/134355988/dfb1456ff52e09.pdf
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/tedixokizadexobefu.pdf
    • http://nufapivevavenak.22web.org/57415996558.pdf
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/puwat-jawatumol-xobufado.pdf
    • http://ruwegekugite.22web.org/backbench_student_songs_free.pdf
    • http://xenogejewaruvi.22web.org/adobe_acrobat_xi_standard_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sebunuzu/how_to_gain_weight_with_healthy_calories.pdf
    • http://wanudozadix.rf.gd/organic_chemistry_alkene_reactions.pdf
    • https://uploads.strikinglycdn.com/files/9760ab51-828b-4a12-ac67-6155cd703fdf/lumiwegus.pdf
    • https://s3.amazonaws.com/xedewofuretujo/dropper_maps_for_minecraft.pdf
    • https://uploads.strikinglycdn.com/files/95299509-f179-4170-8a56-907ab1b0475a/14227713340.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010285.bin
fe8785ef413dbd5fb7711f4bc972fb6a2dc48fa7ea680269b8440d7f260b77b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 5632 bytes
font_01_sfnt_off0001159d.bin
d722c54d974460c16a7121df64fe5069eca66738a2e1ae1b33009dcec17d9e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 11336 bytes

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