Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ba564b3974c27b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 18:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 66e4cd9b85d37e909bc8307b83734cb4 SHA-1: e8827b0a270038d7b03e2143ed71b79f1a5d9468 SHA-256: a1ba564b3974c27bee48f18716af9b1d496794a4d54af3a8122a02988f764b48
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a PDF link farm and ML classification. It contains a large number of external links, with the primary suspicious URL being https://vilenefex.ru/wix?keyword=mike%2527s+huli+huli+chicken+restaurant. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://vilenefex.ru/wix?keyword=mike%2527s+huli+huli+chicken+restaurant PDF link annotation
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/8560395.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/automotive_repair_shop_business_plan.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/44c750e.pdfIn PDF document text
    • https://dovomarolod.weebly.com/uploads/1/3/0/9/130969455/d1334dd61e82266.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/idjhPjd/84919080511.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/ie6giic/real_racing_3_obb_apkpure.pdfIn PDF document text
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/ferifeze_dirogakejop_zasimalepajile_linaped.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/food_safety_temperature_chart_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vafizolubev/gfOigBF/android_guideline_java._lang._assertionerror_left.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/zutujesaz.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/jozaponi/arduino_uno_schematic_r3.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_6d5765278c3f4e75a3c8e8782c6b1dbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/online_android_app_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/disifuxaraterexokuso.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/ronco_showtime_rotisserie_chicken.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/2287306839.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_32bcfa9abaf9419b9464a912dd51ae8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/kokureku.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_07215512e86f4e008f76f4d36e329230.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_1f47949a37634886a95992b9a9a70feb.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_790d6544a5af44b6bdd11c9cc9bd11ed.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_7231cd0b68484b24a2e1b7822f3a5dd7.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 4992 bytes
SHA-256: 73c9a3b8b55ba36bd13b04f15ba7ffe7a6382b52455547db0618dfaf92b2578b
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 11352 bytes
SHA-256: 651634bd81465e4d9835653e18ad026547968da0db5ea2c21059a292f1267da6

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