Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9a5aa3618212f0…

MALICIOUS

PDF

44.1 KB Created: 2020-05-18 15:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6c4f8e8a6fa8c619acb2e2d7c4cec33e SHA-1: e20df9f71d9ce8a96774360d812411314149620a SHA-256: 2b9a5aa3618212f0c5c6adde2d52e74b0bbdb19c693b14fb00b6dde9fae4004f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This indicates a link farm or SEO spamming technique. One of the embedded URLs, 'http://twistedsugarut.com/uploads/1/3/1/3/131383719/131383719.html#shadow+of+the+tomb+raider+reinforced+knife', is directly referenced in the document's text, suggesting it's a primary lure. The primary purpose appears to be directing traffic to these external resources, potentially for advertising, SEO manipulation, or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://twistedsugarut.com/uploads/1/3/1/3/131383719/131383719.html#shadow+of+the+tomb+raider+reinforced+knife PDF link annotation
    • http://theyuppsylife.com/uploads/1/3/0/5/130551050/xiketefovu_mewubojigofalus.pdfIn PDF document text
    • http://mrandmrsmonnet.com/uploads/1/3/0/5/130538953/lilaledanolanug.pdfIn PDF document text
    • http://585cloud9.com/uploads/1/3/0/5/130545957/rivofa.pdfIn PDF document text
    • http://cornerstoneauto.info/uploads/1/3/1/4/131437656/pepamawewi_rubomanez.pdfIn PDF document text
    • http://deutsches-haus-sonthofen.de/uploads/1/3/1/3/131381605/xojopaganufojaka.pdfIn PDF document text
    • http://shanepaulodoherty.com/uploads/1/3/0/5/130588489/304083a56.pdfIn PDF document text
    • http://vialitteris.com/uploads/1/3/1/4/131452732/6412253acfb42.pdfIn PDF document text
    • http://villagedoula.com/uploads/1/3/0/7/130776483/99d89f0cf.pdfIn PDF document text
    • http://solidgroundpdx.org/uploads/1/3/1/3/131381850/6529089.pdfIn PDF document text
    • http://futureglobalaerospace.net/uploads/1/3/1/6/131606577/najate-luduxepojifev-komopanosoxovi-folepodorojit.pdfIn PDF document text
    • http://socalfitnessproducts.com/uploads/1/3/0/2/130288348/5324130.pdfIn PDF document text
    • http://resilience-ventures.com/uploads/1/3/1/3/131384544/47cc7f814a.pdfIn PDF document text
    • http://tutormx.com/uploads/1/3/1/8/131856105/kakoduxuxu_defelub.pdfIn PDF document text
    • http://amppickleball.org/uploads/1/3/0/7/130776743/bf43c9d0b2a.pdfIn PDF document text
    • http://sdginitiative.org/uploads/1/3/0/7/130739383/1087437.pdfIn PDF document text
    • http://aspenpianoacademy.net/uploads/1/3/0/3/130324004/f893a741a39be2.pdfIn PDF document text
    • http://socialcomedynetwork.com/uploads/1/3/0/6/130639121/7874299.pdfIn PDF document text
    • http://daniellegrayart.com/uploads/1/3/0/2/130288924/3973133.pdfIn PDF document text
    • http://acikhatal.com/uploads/1/3/0/5/130588475/ce99a0aa3d406.pdfIn PDF document text
    • http://booloumbaarts.com/uploads/1/3/0/3/130323932/f631c69c46e.pdfIn PDF document text
    • http://chileanassociation.net/uploads/1/3/0/2/130289313/643e55.pdfIn PDF document text
    • http://secretdiaryofanycgirl.com/uploads/1/3/0/7/130739152/3301878.pdfIn PDF document text
    • http://cleanmypoolsugarland.com/uploads/1/3/0/2/130288542/wudekikuxigava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 10308 bytes
SHA-256: cdbca9a9d33bfcd3630e98670b4fd97342731cf94f8adf08b7692d0c360e13bb

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