Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ddd07b085fa6e5…

MALICIOUS

PDF

75.8 KB Created: 2021-03-26 01:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a2596d162c81e30d36b4f93496b3776 SHA-1: 2f5e0fea79ba5c1e4de4ba4bf0c2a0cc0509fb7b SHA-256: b5ddd07b085fa6e534e59764363a953c284faa81482b2e6217dc9cf54515e3f5
186 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 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=bose+lifestyle+25+manual PDF link annotation
    • http://rowaxamapitowej.getenjoyment.net/diplomacy_henry_kissinger_download.pdfIn PDF document text
    • http://zasoremejoka.iblogger.org/74488906120.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/texawuvogowora-kotepuxazazama-zililaxixos-viradepapat.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/baybayin_tagalog.pdfIn PDF document text
    • http://jazabezul.iblogger.org/photo_editor_pro_apk_free.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/vimirosujuvaxolevuge.pdfIn PDF document text
    • https://xiwigelu.weebly.com/uploads/1/3/4/6/134644840/704076dab725dd.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/weber_barbecue_grill_near_me.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/6d2b8cfc-502b-48f7-9c55-8c99c1ec95e5/4673144571.pdfIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_94eedf50c1684ee986c7ed37f2aa902a.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_27fbc5c2fd244e9f8d482b44ae0bb3c3.pdf?index=trueIn PDF document text
    • http://moxosutemow.onlinewebshop.net/vipigorevukizo.pdfIn PDF document text
    • http://fuginifetulad.epizy.com/jumiza.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_fcc0206092aa4b84a3086d2a5097c275.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_b036a139f14b4a8880d99208b32d3463.pdf?index=trueIn PDF document text
    • http://jasofulutix.rf.gd/3801968119.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/egyptian_arabic.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/fe_exam_study_material.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_0b51e9e65d9b4f5a98cf6684935ee197.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/761912f7-6e14-4d33-83ba-5d8ff7ec411b/twilight_saga_eclipse_part_2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 5224 bytes
SHA-256: a82565a9e64107e956c46ffed5d658e2cab437885fba26d098a83a63362429c5
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 12588 bytes
SHA-256: f9839446abf4a71e7f4f81d7e1eeb27ad544d4c27eca4cc076ca14464a5f0d0d

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