Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1a05366fa621c3…

MALICIOUS

PDF

41.2 KB Created: 2020-04-01 18:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 4be3348911dfa0a26636f3e8cbeddfe1 SHA-1: 014e4fa1197e94da9e1d123bf746eae7f719d1e6 SHA-256: 4a1a05366fa621c30d7089e331279848fb0f7382b718d03a032d23ee501a246b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDFs hosted on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to malicious or low-quality content. The document body itself is largely garbled but contains a reference to a coloring book, likely a lure. No scripts were extracted from this sample.

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://deloserve.com/uploads/1/3/0/3/130323139/130323139.html#boca+animada+para+colorear PDF link annotation
    • http://pellipandiri.com/uploads/1/3/0/7/130739362/vusazat.pdfIn PDF document text
    • http://hostmaster.honeypotcreativecafe.com/uploads/1/3/0/4/130477009/2648440.pdfIn PDF document text
    • http://dominicdormouse.com/uploads/1/3/0/5/130588617/wirazagak_fatovi_sinamujubo.pdfIn PDF document text
    • http://mylibruldad.com/uploads/1/3/0/2/130289675/tudufabafopawotutipa.pdfIn PDF document text
    • http://darijaradic.com/uploads/1/3/0/3/130379169/1770776.pdfIn PDF document text
    • http://englishinsights.com/uploads/1/3/1/4/131453512/8852215.pdfIn PDF document text
    • http://africanconservationhub.com/uploads/1/3/0/4/130488741/wesinew_tumak_taxezorepoke.pdfIn PDF document text
    • http://retrayno.com/uploads/1/3/0/5/130589114/2d136711.pdfIn PDF document text
    • http://jewelry-fragrance.com/uploads/1/3/1/4/131406453/barufot.pdfIn PDF document text
    • http://mantrafarm.com/uploads/1/3/0/8/130814960/vizudi.pdfIn PDF document text
    • http://ariseandshinephotos.com/uploads/1/3/0/3/130323936/gobijimiwejememos.pdfIn PDF document text
    • http://theguardian.academy/uploads/1/3/0/2/130272955/kifexonedowonusana.pdfIn PDF document text
    • http://vernalinzey.com/uploads/1/3/0/8/130813582/bc18e6aedd.pdfIn PDF document text
    • http://tinakuhncommunication.net/uploads/1/3/0/7/130739264/4741731.pdfIn PDF document text
    • http://geekygiftbaskets.com/uploads/1/3/0/5/130540296/3176828.pdfIn PDF document text
    • http://mydiamondmakers.com/uploads/1/3/0/5/130550867/beluw.pdfIn PDF document text
    • http://natureofthebody.com/uploads/1/3/0/8/130874469/wigadutekojupifi.pdfIn PDF document text
    • http://mhsptsa.org/uploads/1/3/0/2/130270776/xofavupid.pdfIn PDF document text
    • http://laurensimkins.com/uploads/1/3/0/7/130740462/tejozujaf_lupoguboro.pdfIn PDF document text
    • http://arkansashorizon.com/uploads/1/3/0/7/130776334/garux.pdfIn PDF document text
    • http://platform-solutions.net/uploads/1/3/0/8/130874422/rojun_zesozav_xabul.pdfIn PDF document text
    • http://ralyvas.store/uploads/1/3/0/6/130604877/dexapodizodisiwodalu.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
    • 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 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_off00006a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 8344 bytes
SHA-256: 1e5b07cf266325f4eccba833a090f2deb0d8b3ce36c682e6ae304c3d1c341104
font_01_sfnt_off000087cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CC 6068 bytes
SHA-256: 89d4582d1f83965f42e23c0e6626d7ada7c01c22518cd1944fd4a7be269fea4f

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