Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd38ac39de43984c…

MALICIOUS

PDF

83.9 KB Created: 2021-03-22 22:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aa5c761f9b1a61a349dbceba23d4fce SHA-1: 96f1d9d2dc9807cc4b4142c25b970f2b35ae7388 SHA-256: bd38ac39de43984c614edad0e9843846b05438edfd1d8a6810d5eab2235cd5d8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, forming a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a "Mega man 6 speedrun guide". The presence of external URIs and the overall structure strongly indicate this PDF is designed to redirect users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://resalured.ru/wix?keyword=mega+man+6+speedrun+guide
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/5874800.pdf
    • http://flowerport.shop/signs_of_infection_after_second_degree_burn7us13.pdf
    • http://fibaxoxadomi.sportsontheweb.net/free_diy_chicken_coop_plans.pdf
    • http://sivelural.mygamesonline.org/xaganowibisawevowatulomib.pdf
    • http://thepropheticapp.com/66374594061oriyx.pdf
    • http://fkpravo.ru/how_do_you_calculate_calories_in_dog_foodgi059.pdf
    • http://stylecurtains.com/ps3_controller_battery_level_on_pcpefz3.pdf
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/lepejepafus-gegalobazazifim.pdf
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/davebexegu.pdf
    • http://daating19.site/vowukemzml5.pdf
    • http://psychologyrelax.xyz/icse_class_9_merchant_of_venice_workbook_answers_downloadbxm8j.pdf
    • https://kegalanomer.weebly.com/uploads/1/3/1/8/131856310/33922deb.pdf
    • http://mikrotikwizard.com/mogemupidesamunejixl3dzx.pdf
    • http://wijasagasipode.getenjoyment.net/41738223377.pdf
    • https://ripulufixi.weebly.com/uploads/1/3/5/3/135388512/vivijivab.pdf
    • http://uscreditmonitoring.info/dinosaur_bone_worksheet3uzwi.pdf
    • http://bigwin-1xbet.fun/387748244090a9y.pdf
    • http://kofupum.mygamesonline.org/77744810491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_89ddd94f5499496d9a3fbc0accfc93cc.pdf?index=true
    • https://efec373b-cb85-4617-95c0-ca1809d574ea.filesusr.com/ugd/9529b1_9c2175bd0a2743d69d2213b5823287e3.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_bde3dfdd5ba0467bbc7b6553fe91448b.pdf?index=true
    • https://s3.amazonaws.com/tetofamuxulil/52407393461.pdf
    • https://s3.amazonaws.com/jefazaxal/colchester_hospital_maternity_form.pdf
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_3c50ac07b3104d969b3497a31f9aaf2e.pdf?index=true
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_ba5bf98c6c5b4414baa8cfcf5e426914.pdf?index=true
    • 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_off00010be0.bin
4dcfb8261cb182177f4dc1af586427873acaa3a26f576c109c4793f8c1748565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 5408 bytes
font_01_sfnt_off00011e37.bin
0f168b9ead0502c0647109eb1e47bd886c5c4ef7fb1ad8a5d4bbfc36364680c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10824 bytes

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