Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9356bd77efea438…

MALICIOUS

PDF

77.3 KB Created: 2021-03-12 19:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9181fc9ebbc4054fad98e0187eadc304 SHA-1: 13af20893a8d3516ccedf7fb72a26f94658d45d7 SHA-256: e9356bd77efea438aec2445f0ef32edfa84adea0bfcd2d82315065ff96314542
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-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://lozipotod.ru/strik?utm_term=why+is+my+netflix+keep+saying+error PDF link annotation
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/4025922.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/1195890.pdfIn PDF document text
    • https://fupesatufijipaf.weebly.com/uploads/1/3/2/7/132740914/bamesekavubeboxilero.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/b1570481e91b.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/dRyo7nJ/winagewijegojir.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/09a56e81ea17e2f.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/HhgSpja/75264864004.pdfIn PDF document text
    • https://sufivelogazawe.weebly.com/uploads/1/3/4/6/134600369/davagudiviviripi.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/dezedamomadi_rodakibujeja_xesolegikifat_tisikupagis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_9873bf7a40294f4fadc22804f4779340.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/xfinity_remote_codes_4_digit.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_4351df7f7c1c41f7b9da1f6e63bfab74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6e091f-3c31-4c3c-ae1c-d43439c95ee1/90798819051.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/benyamin_biang_kerok_reborn.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/melagasemowun.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/uk_visa_application_form_in_nigeria_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c93a831-151d-43ea-b008-36379ef549e7/xosiguk.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/29107318384.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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 5564 bytes
SHA-256: 255e1a9f7f305662b75ee1d210fb2bf3cb293dd12f1b627ae2a627b81f00f469
font_01_sfnt_off0001051b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051B 10348 bytes
SHA-256: 060ffa35098a051ee716bddf6c525f973018423edc76e871291ce907659b1950

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