Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ffeaa6d3265907…

MALICIOUS

PDF

36.9 KB Created: 2020-05-16 05:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4ed632b8ab743c9dad1d7483a3ddba41 SHA-1: df2f67865f2a3a8dc8dbf3bd5e0c207789e7adea SHA-256: 76ffeaa6d3265907c8beef5e103febbf744b6f0d5a94eb86ab679fa772fd73ca
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links pointing to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests an attempt to direct users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://wildchild.dance/uploads/1/3/0/5/130547576/130547576.html#roller+shutter+data+sheet PDF link annotation
    • http://hernur.com/uploads/1/3/0/7/130776509/3043445.pdfIn PDF document text
    • http://walserforcommissioner.com/uploads/1/3/0/5/130590665/mepajezezab.pdfIn PDF document text
    • http://farmkiosk.shop/uploads/1/3/0/5/130551132/lutojulaxi.pdfIn PDF document text
    • http://tzaddi.net/uploads/1/3/1/1/131164021/8856394.pdfIn PDF document text
    • http://spliceoflifefilms.com/uploads/1/3/0/7/130738989/tagepevizisikosafemo.pdfIn PDF document text
    • http://divine-beloved.com/uploads/1/3/0/5/130539642/8393782.pdfIn PDF document text
    • http://drainwizarddenver.com/uploads/1/3/1/3/131398117/dajabufuloluv_kefolobapuwix.pdfIn PDF document text
    • http://whatsfordinnerwendy.com/uploads/1/3/0/2/130288401/tusazagulawevabexoka.pdfIn PDF document text
    • http://thegoodlifebiblestudies.org/uploads/1/3/1/4/131454683/7326334.pdfIn PDF document text
    • http://paperbleudigitals.com/uploads/1/3/0/4/130436121/2129105.pdfIn PDF document text
    • http://foregolfclub.org/uploads/1/3/0/2/130273571/31cbb2c9360eba.pdfIn PDF document text
    • http://eidolonsys.com/uploads/1/3/1/4/131438348/sonasewijobodev-duvugisosu.pdfIn PDF document text
    • http://sperogolubfoundation.org/uploads/1/3/0/5/130543264/4022306.pdfIn PDF document text
    • http://integrityfixedincomemanagement.com/uploads/1/3/0/4/130490006/6721121.pdfIn PDF document text
    • http://jansherer.com/uploads/1/3/0/2/130289719/525150.pdfIn PDF document text
    • http://afege.org/uploads/1/3/1/4/131406604/40e620ca3a036.pdfIn PDF document text
    • http://urbanaffluence.co/uploads/1/3/0/9/130969835/5126786.pdfIn PDF document text
    • http://blacklocustlumber.eu/uploads/1/3/1/8/131857024/67114b.pdfIn PDF document text
    • http://dalcomme.com/uploads/1/3/1/8/131871405/18760c7bd949.pdfIn PDF document text
    • http://lonepeakwoodworkx.com/uploads/1/3/1/4/131438127/602069833653.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 6

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_off00006768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 9572 bytes
SHA-256: c02721afc57074d3fd43b09dfba2a11a8ef977872af5469092dffe5019aa8c8f

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