Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71f82144bd96385…

MALICIOUS

PDF

46.2 KB Created: 2020-04-17 23:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: c42a329ad260b54c2321fa61c6621186 SHA-1: c7d355bb571edeae9135d2ae866d405e48c3d6c6 SHA-256: a71f82144bd963850135ff4f7a0334a1ad85a4ebaab5518614d149094d47c55a
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, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic also flagged this file with high confidence. The document body contains a mix of seemingly irrelevant text and embedded URLs, suggesting a deceptive or manipulative purpose. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content hosted across multiple domains.

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://edgeschoolsearch.com/uploads/1/3/1/3/131383998/131383998.html#bollywood+movie+video+song++site PDF link annotation
    • http://whybotherco.com/uploads/1/3/1/3/131381144/xupupadire.pdfIn PDF document text
    • http://paradisekennel.ca/uploads/1/3/0/5/130543368/witunanajalomos_dipafuke.pdfIn PDF document text
    • http://seelenleben.ch/uploads/1/3/1/0/131070381/muzeberotetebibasadu.pdfIn PDF document text
    • http://creativehealthoptionsllc.org/uploads/1/3/1/4/131410479/4b488083ea93cae.pdfIn PDF document text
    • http://hotmessbliss.com/uploads/1/3/0/2/130291766/gewis.pdfIn PDF document text
    • http://stayactivesandiego.com/uploads/1/3/0/5/130538985/78258.pdfIn PDF document text
    • http://blacklistacademy.com/uploads/1/3/0/6/130604391/4959139.pdfIn PDF document text
    • http://paternopictures.com/uploads/1/3/0/7/130740391/fitikenowe.pdfIn PDF document text
    • http://defendyoursmile.com/uploads/1/3/0/8/130874124/3485761.pdfIn PDF document text
    • http://thebookreclusereview.com/uploads/1/3/1/4/131406656/9625513.pdfIn PDF document text
    • http://danandavan.com/uploads/1/3/1/4/131409884/tonoterunadituvofa.pdfIn PDF document text
    • http://rrrtag.com/uploads/1/3/0/5/130589385/020cda688.pdfIn PDF document text
    • http://dimcreations.com/uploads/1/3/0/8/130874668/3271292.pdfIn PDF document text
    • http://stevenshomeinspections.ca/uploads/1/3/1/3/131380052/1931069.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5776 7316 bytes
SHA-256: b1118302c5517eb61a6a239cbb0c0398f36a596cc95e76ebefef7294164c1510
font_01_sfnt_off00006a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 7204 bytes
SHA-256: ee052c8ffd260a03d355fca8adc458f9bd6379885acdcf2f38dee58ed2ffcbcc
font_02_sfnt_off000086a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A9 2008 bytes
SHA-256: b251e00b4eea5cbc23adf0180395c4102aea23bcfb5d03ea18ed6a7b261a67d7
font_03_sfnt_off0000905f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905F 9436 bytes
SHA-256: e2f2c1810856fb7001a0270f7b1d9ced20fd46de7942fd63cc1e71d4713302ea

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