Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd56a1197b9986c…

MALICIOUS

PDF

45.0 KB Created: 2020-03-08 04:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 1bcad02e415112eb020867a3606587f7 SHA-1: 3e69eba8f57d9907cd4ccfd3a5d2315f952769ae SHA-256: dfd56a1197b9986cf2e4f9a2975ba21b13536552b5dcb1e2a66a76f0de166c35
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external URLs points to a delivery mechanism for potentially malicious content or a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://merrit-wedding.rominastiebenphotography.com/uploads/1/3/0/4/130478772/130478772.html#cumulative+distribution+function+excel+example PDF link annotation
    • http://stepup.london/uploads/1/3/0/6/130620948/421ec895a49.pdfIn PDF document text
    • http://myvisl.us/uploads/1/3/0/3/130313289/6347446.pdfIn PDF document text
    • http://www.leeslawnmowerandsmallenginerepair.com/uploads/1/3/0/3/130323271/jofitidozaki-pagopodakatitin.pdfIn PDF document text
    • http://empoweredptbirth.com/uploads/1/3/0/7/130738628/gejolurigufoj.pdfIn PDF document text
    • http://balboaislandrealtor.com/uploads/1/3/0/5/130550711/276e3d018a2.pdfIn PDF document text
    • http://scribblesandwhispers.com/uploads/1/3/0/4/130489398/2751401.pdfIn PDF document text
    • http://nationaldebtmgmt.com/uploads/1/3/0/7/130739653/d0f788aa68de3a.pdfIn PDF document text
    • http://raahulramakrishnan.com/uploads/1/3/0/2/130271002/1d9fc26.pdfIn PDF document text
    • http://northsidecigars.com/uploads/1/3/0/7/130775134/xigowawovula.pdfIn PDF document text
    • http://juliewilkening.com/uploads/1/3/0/6/130604710/bipuxemewiko-visogono-tatisifomisow-koxiligok.pdfIn PDF document text
    • http://allopoisson.com/uploads/1/3/0/4/130483581/c032199.pdfIn PDF document text
    • http://hostmaster.umbrianhills.vc/uploads/1/3/0/8/130874488/mowadif.pdfIn PDF document text
    • http://hostmaster.theolivercurdtrust.org/uploads/1/3/0/8/130873860/3e5bd30b41.pdfIn PDF document text
    • http://cotoart.com/uploads/1/3/0/4/130435937/9a01cb.pdfIn PDF document text
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/4/130479044/801f3d6.pdfIn PDF document text
    • http://1stollie.com/uploads/1/3/0/6/130605493/9231661.pdfIn PDF document text
    • http://www.minimalteacher.com/uploads/1/3/0/6/130639356/66503b921fe.pdfIn PDF document text
    • http://jessiessouthsideperformance.com/uploads/1/3/0/6/130621032/9bb00.pdfIn PDF document text
    • http://makearteveryday.net/uploads/1/3/0/6/130639175/xekakuvosawa-rupewutoje.pdfIn PDF document text
    • http://rachellepinnow.com/uploads/1/3/0/2/130271131/3249462.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 4

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_off000066e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 8016 bytes
SHA-256: 307f2db4753c4a6dfec9e809ee63b8751134b1f33f256a917eb38012ce8ee233
font_01_sfnt_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 2820 bytes
SHA-256: 39bc079289fa647ff8c8bc8a836ada9dce32d68f37464a9c317e1578ffe60a1d
font_02_sfnt_off00008fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE7 16148 bytes
SHA-256: c715d70b655cc84612960fb88a4e12085ad92abfa9c7e55edaa865827c7872ae

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