Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b846d7cf8a98dc…

MALICIOUS

PDF

45.6 KB Created: 2020-03-31 01:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5074b9fef0b5503458f265686297bd9c SHA-1: 76f1e45100b792bfc3d2e7262e97dcbb2bfb8a91 SHA-256: e9b846d7cf8a98dca13888ae361a8635f12a37a9ce183819af69db15b7e1a008
196 Risk Score

Malware Insights

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

The PDF file was identified as a dropper by ClamAV. It contains a large number of external links, indicating a link farm strategy. The primary URL is http://asianart.studio/uploads/1/3/0/6/130604259/130604259.html#notes+from+underground+best+translation+reddit, and numerous other PDF links are present, suggesting the document's purpose is to redirect users to potentially malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-8914117-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8914117-0
  • 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://asianart.studio/uploads/1/3/0/6/130604259/130604259.html#notes+from+underground+best+translation+reddit PDF link annotation
    • http://mdfenceanddeck.net/uploads/1/3/0/6/130639856/gomeruborif.pdfIn PDF document text
    • http://girlsempowergirls.com/uploads/1/3/1/3/131379622/fe967d0af.pdfIn PDF document text
    • http://aka108.com/uploads/1/3/0/2/130289301/5328480.pdfIn PDF document text
    • http://emulawnsgardens.com/uploads/1/3/0/6/130621800/58e25a1.pdfIn PDF document text
    • http://jacenrivera.com/uploads/1/3/0/4/130488195/pikejaxurumexugujom.pdfIn PDF document text
    • http://fotografikigonia.com/uploads/1/3/0/2/130289682/nibisi.pdfIn PDF document text
    • http://femmespiremedia.com/uploads/1/3/0/7/130776677/jetipujupiki.pdfIn PDF document text
    • http://mysearchrealestate.com/uploads/1/3/1/3/131379252/soposekak.pdfIn PDF document text
    • http://amadeustallerintegraldeaprendizajes.com/uploads/1/3/0/3/130323236/bfa97e7545a.pdfIn PDF document text
    • http://chapel-designs.com/uploads/1/3/1/4/131407029/5040883.pdfIn PDF document text
    • http://mywilshiremanning.com/uploads/1/3/0/2/130271060/pejibipu_zitibisa_kezimebifod_mezogexaz.pdfIn PDF document text
    • http://takethecakeinajar.com/uploads/1/3/0/6/130621459/5740026.pdfIn PDF document text
    • http://cvf-brasil.com/uploads/1/3/0/2/130270945/wamubivifixaxuto.pdfIn PDF document text
    • http://draustinhayescosmeticsurgery.com/uploads/1/3/0/7/130776725/4166622.pdfIn PDF document text
    • http://nude-portraits.com/uploads/1/3/0/9/130969510/2a966a30.pdfIn PDF document text
    • http://guamfirearms.com/uploads/1/3/1/0/131071181/fbbe7c7fe38a24.pdfIn PDF document text
    • http://picadillyphotography.net/uploads/1/3/0/6/130639246/silok.pdfIn PDF document text
    • http://mdecaro.com/uploads/1/3/0/5/130588754/9547846.pdfIn PDF document text
    • http://stacysdogtraining.com/uploads/1/3/0/7/130739046/dizunilon.pdfIn PDF document text
    • http://dahlgrencollc.com/uploads/1/3/0/7/130739061/guputu.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

Related samples 8

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_off000086f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F0 8272 bytes
SHA-256: aba20c65dedaecd293077520cbbb814647be60f2a1f78981111c49a64a1b433c

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