Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf11e7dd883872d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 19:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a61a9f707df67b8b84cefa7a6e712e27 SHA-1: b87710c9521fd234d3188ea24973051da50cb83f SHA-256: 7bf11e7dd883872d4ace3cfb251509140289fc8988a3a94058a8c0632a8c9ba3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://xajibur.ru/wix?keyword=ever+after+high+books+free+pdf PDF link annotation
    • https://cdn.sqhk.co/zikufivol/Y4AZrif/pamokeliwupug.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/wedajekijosiriwus.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/eajj54e/47101240583.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/jdifebx/jurassic_world_alive_hack_android.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/ErihijC/nowoxasug.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/djgIzjf/strawberry_angel_food_cake_vanilla_pudding_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/ieijifV/5530379501.pdfIn PDF document text
    • https://zagusopiv.weebly.com/uploads/1/3/4/2/134234894/nisedivozoloz.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/ioVxjfK/chocolate_pudding_poke_cake_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/cidwjbP/72109327681.pdfIn PDF document text
    • https://linazoforup.weebly.com/uploads/1/3/0/8/130814758/8c08a126fe5bd4.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/jatieyn/98410160611.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/pobekupozo.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/jHdkChd/garojosozilivitakunabaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wijugilom/IE5ifie/flip_range_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/heThbce/video_mixer_app_free_download_for_mobile.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/a7129802-3808-4702-b9c2-af88c0fed8df/56550269419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c29b8c-61da-4100-acd2-dee14c8666a6/pisokamikawit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5b4858-7406-4ff6-96a1-b864cbb4f820/ripotefetekovow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3751cc-bb1f-481e-87bd-0f57eae1a6b2/mary_rowlandson_a_narrative_of_the_captivity_themes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 5492 bytes
SHA-256: 8127afe3e4c59752766ff80ed66de26cc5fd96bcc9ee0f38ad31e9a1c24b1e45
font_01_sfnt_off00010099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 11676 bytes
SHA-256: 5cbafd0b412656ed2f4b8af127ee0a644b17bea183758533f911b9636d6fd84c

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