Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad010398da1b8cd…

MALICIOUS

PDF

48.0 KB Created: 2020-07-10 01:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 615ad3ac72ed349e17a8d97d5b0adf6a SHA-1: 1ebea0ffb818b994c5c2987c4d9380e2a690d640 SHA-256: 5ad010398da1b8cd43e13604f0326a41d89464c73087ffdae8698e7af4133bec
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by an ML classifier and contains a significant number of embedded URLs. These URLs point to a link farm hosted on various domains, with one redirecting to a known malicious infrastructure. The document's purpose appears to be to lure users into clicking these links, potentially leading to further malicious content or phishing attempts. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.ru/wb?keyword=uniden%20bc125at%20scanner%20manual In PDF document text
    • http://files.all-naturalchiro.com/uploads/1/3/2/7/132741020/zimiwusomujib-xulojuxe-buralizi.pdfIn PDF document text
    • http://files.normanmuseum.org/uploads/1/3/1/3/131379815/lukagesan.pdfIn PDF document text
    • http://files.peaceplaceinc.org/uploads/1/3/1/1/131163955/webumotonela.pdfIn PDF document text
    • http://files.messiahfamilies.com/uploads/1/3/1/4/131406075/tulawofiruz-fanawe-tusefebegatisof.pdfIn PDF document text
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdfIn PDF document text
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdfIn PDF document text
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdfIn PDF document text
    • http://files.branchblaze.org/uploads/1/3/1/3/131398171/51da234b9bee00.pdfIn PDF document text
    • http://files.thepiteamofillinois.com/uploads/1/3/1/4/131408241/wobosinemasaje_sikuzuburunime_katipa_ronuwuri.pdfIn PDF document text
    • http://files.crossoverkicks.com/uploads/1/3/1/4/131454492/lagixozinu_vererasunixeniz_xabav.pdfIn PDF document text
    • http://files.fengshuixing.com/uploads/1/3/2/7/132740730/fowejotenivirup_kazivel_zokomafig_kirixiranu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ketikukowef.files.wordpress.com/2020/06/77848132628.pdfIn PDF document text
    • https://sosasifen.files.wordpress.com/2020/06/67739870585.pdfIn PDF document text
    • https://savakuwi.files.wordpress.com/2020/06/91383816202.pdfIn PDF document text
    • https://basilikavo.files.wordpress.com/2020/07/55272160375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.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_off00007558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 5296 bytes
SHA-256: e040c3b0aef9718a97e0dd1a2a49aaba9599faa028fbd04f492b6597ed015a85
font_01_sfnt_off0000873b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873B 14064 bytes
SHA-256: 1713df1c191ec61788f5918a17f44ed369d8cb112fd8d52825bc51219d34525b