Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda917050254f217…

MALICIOUS

PDF

53.1 KB Created: 2020-06-03 20:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: cb37377a237a1f2cf130354ded3ee644 SHA-1: d4279c98d124d559161bf0f8edee15638b9d92bb SHA-256: eda917050254f217352383f064dcc9b5ad62d6aab17351f81b276428fba2fbb8
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though heavily obfuscated, contains a URL that is also present in the list of extracted URLs. This suggests the document is part of a link farm or SEO spam campaign, designed to direct users to a network of potentially malicious or low-reputation websites.

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://constructor.eniroweb.pl/uploads/1/3/0/9/130969368/130969368.html#300km+to+mi PDF link annotation
    • http://crosswoundsfoundation.org/uploads/1/3/0/7/130739333/7635301.pdfIn PDF document text
    • http://seven16music.com/uploads/1/3/0/4/130476866/liloxovux_pekixule.pdfIn PDF document text
    • http://miriamsterzelblog.com/uploads/1/3/1/4/131437385/8897229.pdfIn PDF document text
    • http://savannahbeach.net/uploads/1/3/0/3/130323884/0ca841ca9e.pdfIn PDF document text
    • http://greekexpress.shop/uploads/1/3/1/4/131407887/9963513.pdfIn PDF document text
    • http://wisecleansydney.com/uploads/1/3/0/4/130483238/mosajik.pdfIn PDF document text
    • http://krisfolio.com/uploads/1/3/0/9/130969774/lijoribofikoji-xipoxujaw-jaluvusujiv-vexixefanuli.pdfIn PDF document text
    • http://mail.ivsaluki.com/uploads/1/3/0/9/130969426/lididuzejulo_dijoneninalo_lakiwa_nofig.pdfIn PDF document text
    • http://falsepeaknews.com/uploads/1/3/1/3/131379532/d623945dfc2895.pdfIn PDF document text
    • http://constructor.eniroweb.pl/uploads/1/3/0/9/130969368/terms.htmlIn PDF document text
    • http://constructor.eniroweb.pl/uploads/1/3/0/9/130969368/dmca.htmlIn PDF document text
    • http://constructor.eniroweb.pl/uploads/1/3/0/9/130969368/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sufiwow.files.wordpress.com/2020/06/51739342149.pdfIn PDF document text
    • https://fugolefok.files.wordpress.com/2020/06/zanatojunewanarawerumip.pdfIn PDF document text
    • https://mobovowafe.files.wordpress.com/2020/05/gerotevuwuzivakenivosati.pdfIn PDF document text
    • https://xefipun.files.wordpress.com/2020/06/7490003746.pdfIn PDF document text
    • https://bowepibikum.files.wordpress.com/2020/05/7884106849.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 12804 bytes
SHA-256: f702c65605c981ae34d63d116407a287704838e371244fcf20236b756aa72b9a
font_01_sfnt_off0000b349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB349 16216 bytes
SHA-256: 571519530e2b389ff47cfe93d716bc4d5d3dc5852555cff6bf4100dec7581f53

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