Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00e65d986839028…

MALICIOUS

PDF

70.1 KB Created: 2021-05-18 04:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b9ec73a687a6ea18adc60466290c6b5 SHA-1: c164ad9fc10633066a41b43b9a6a6a3a9f36da66 SHA-256: e00e65d986839028923f02adc77541b2c00c1ccafc1e4edff0b28927a0efe45d
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-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.
  • 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://kuzutuzo.ru/strik?utm_term=suma+resta+multiplicacion+y+division+ejercicios+pdf PDF link annotation
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/tusovojum.pdfIn PDF document text
    • https://juvifopabolosat.weebly.com/uploads/1/3/5/3/135313118/gobaginepi-pazujemudonelax-pinasozekexefep-palabubitinos.pdfIn PDF document text
    • https://maxolesaso.weebly.com/uploads/1/3/0/7/130776327/kurabevazebizokuz.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/4637456.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/lozifopabum.pdfIn PDF document text
    • https://xibabajawaxas.weebly.com/uploads/1/3/1/3/131398380/788fdac9.pdfIn PDF document text
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/8065776.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/surabirojit_zikor_purot.pdfIn PDF document text
    • https://jaxefosizi.weebly.com/uploads/1/3/6/0/136083017/zosemem_dabava.pdfIn PDF document text
    • https://latolupolazu.weebly.com/uploads/1/3/4/0/134017494/famefejezedipuvuke.pdfIn PDF document text
    • https://bobazuforabi.weebly.com/uploads/1/3/1/4/131452976/5952416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavopaku.rf.gd/98758725900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e43fc7-90b0-4df1-959b-34fe8f00dc65/nedopebobipurusijawewituv.pdfIn PDF document text
    • http://rokuwesepetab.rf.gd/ketchikan_alaska_fly_fishing_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08899c00-c20a-4eb8-b3f1-cd1b1547de2b/introductory_mathematical_analysis_for_business_economics_and_the_life_and_social_sciences_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed17296-d65b-49ae-b6b0-1048fa067990/what_are_the_6_human_needs.pdfIn PDF document text
    • http://xazejove.epizy.com/46446325083.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_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 5644 bytes
SHA-256: 6b26e88fed3f766a12a5f82c754604638db37ec40e6f888d670d9050064cb45a
font_01_sfnt_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 11328 bytes
SHA-256: 993457b14d818579d0dc9c33cd149f84657322702d7b10d1720e2af47ed81d0d

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