Malicious PDF — malware analysis report

Static analysis result for SHA-256 982a9063ab2398ce…

MALICIOUS

PDF

46.3 KB Created: 2020-04-06 05:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5924838ce0eb47da7909b6159ce9f9a3 SHA-1: 0a3953d70d56103823d8f534887681ebe97cd9b8 SHA-256: 982a9063ab2398ce7b1cb910756d77efc26bf36285863158130ad9d9ac9f7717
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files on various domains. This suggests a link farm or SEO poisoning tactic designed to drive traffic to these external resources. The primary external link identified is http://adoptionandmentalhealth.com/uploads/1/3/0/7/130775865/130775865.html#icd+10+code+for+recurrent+flash+pulmonary+edema, which appears to be part of this network.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://adoptionandmentalhealth.com/uploads/1/3/0/7/130775865/130775865.html#icd+10+code+for+recurrent+flash+pulmonary+edema PDF link annotation
    • http://creatingviriditas.com/uploads/1/3/0/5/130589195/31ccaa.pdfIn PDF document text
    • http://summitwineandspirits.com/uploads/1/3/0/7/130738507/tepadotunananuf.pdfIn PDF document text
    • http://trwalk.com/uploads/1/3/0/5/130551124/8477151.pdfIn PDF document text
    • http://formasspa.com/uploads/1/3/0/7/130738814/037e8.pdfIn PDF document text
    • http://emilysanderslearningsite.com/uploads/1/3/0/7/130740458/1b2fcd9a925a9.pdfIn PDF document text
    • http://suscollection.com/uploads/1/3/0/6/130604083/gugogipibexeru.pdfIn PDF document text
    • http://futurereadytoday.org/uploads/1/3/0/6/130639408/sogusowobexuril.pdfIn PDF document text
    • http://jodietouhy.com/uploads/1/3/0/4/130488316/mukojawel_vekibogubu_gikurog_lovufutabixez.pdfIn PDF document text
    • http://photographyinplaya.com/uploads/1/3/0/7/130739162/zomaxafosabur.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 8732 bytes
SHA-256: afd466cb51f57db8dfb569b66b2b6ccf644334e3cd4cf6fd7783c2e99bc0fd2e
font_01_sfnt_off00008a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 3464 bytes
SHA-256: c0f53a05459f97f0bc6332f331c3835f003b6f53c12d8eac53d78508c1b5af1d
font_02_sfnt_off0000966b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966B 16132 bytes
SHA-256: 014a06d3ebcab26b292cd89b1c4156f34f806217642b385644bdac287d77828e

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