Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96b339b40843220…

MALICIOUS

PDF

82.1 KB Created: 2021-04-01 02:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0061fc493aeed39e3bef422f9ac406a4 SHA-1: dbb0a4042a84af0ebc39f2491654c375149d9102 SHA-256: a96b339b408432208129a370b9d14a46cf240a4319c650ef9a1eeeb2653afde3
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 0.9998

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://botokaw.ru/wix?keyword=queen+bees+and+wannabes+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388820/normal_5ff7925f85b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_5fdc52214ca11.pdfIn PDF document text
    • http://difipalilif.scienceontheweb.net/ram_dass_documentary_netflix.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/history_of_the_mind_body_problem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501479/normal_60584ef5bfa9f.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/bosquejos_evangelisticos_de_salvacion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_60484e558f42e.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/2975956130.pdfIn PDF document text
    • http://mojofaza.mypressonline.com/discoveries_in_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_6032c9925f2f9.pdfIn PDF document text
    • https://kipunelikerave.weebly.com/uploads/1/3/0/9/130969086/4096220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fed1f08b30a4.pdfIn PDF document text
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/1feff2eae10ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fe6d7bf44e77.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/kubub.pdfIn PDF document text
    • http://sakipewo.22web.org/sikixixatenovukodoxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakorizu.epizy.com/5785769013.pdfIn PDF document text
    • http://lapamesudosit.rf.gd/hanuman_chalisa_telugu_ms_rama_rao_mp3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 5328 bytes
SHA-256: 01cde7b8dba6df552f0d39236f7a5a92c367a480b2126331346a63892a97a62f
font_01_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 11564 bytes
SHA-256: 898f6302cfceef72a86c3eec5df35df2e6288fc90c3c7b75c74151a1b726e0e3
font_02_sfnt_off000125e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E2 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6

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